Answer:
The first droplet will hit the ground after about 1.54 seconds.
The second droplet will hit the ground after about 1.6 seconds.
Thus, the first hits the ground first.
Step-by-step explanation:
We are given the function:
[tex]y=-16r^2 + 38[/tex]
Which represents the height y in feet of a water droplet t seconds after falling from an icicle.
Part A)
We want to find the time it took for the water droplet to hit the ground.
When it hit the ground, its height y above ground will be zero. Therefore, we can let y = 0 and solve for r:
[tex]0=-16r^2+38[/tex]
Subtract 38 from both sides:
[tex]-38 = -16 r^2[/tex]
Divide:
[tex]\displaystyle r^2 = \frac{38}{16} = \frac{19}{8}[/tex]
And take the principal square root of both sides:
[tex]\displaystyle r= \sqrt{\frac{19}{8}} = \frac{\sqrt{38}}{4} \approx1.54\text{ seconds}[/tex]
So, the first water droplet hits the ground after about 1.54 seconds.
Part B)
We want to determine how long it will take for a water droplet to hit the ground from a height of 41 feet.
From the original equation, if r = 0, then y = 38. So, the initial height was 38 feet.
Then we can modify the function into:
[tex]y= -16r^2 + 41[/tex]
In this case, when r = 0, the starting height y is 41 feet.
Again, let y = 0 and solve for r:
[tex]0 = -16r^2 + 41[/tex]
Isolate:
[tex]\displaystyle r^2 = \frac{41}{16}[/tex]
And take the principal square root of both sides:
[tex]\displaystyle r = \sqrt{\frac{41}{16}} = \frac{\sqrt{41}}{4} \approx 1.6\text{ seconds}[/tex]
So, the second drop will hit the ground after approximately 1.6 seconds.
And in conclusion, the first drop will hit the ground sooner (as expected).
Pls help I’ll brainlest ASAP
Line f has a slope of -9/7. Line g is perpemdicular to f. What is thr slope of line g
Help help help help help help help math math
Answer:
Step-by-step explanation:
5x + 10 + 10x + 5 = 180
15x + 15 = 180
15x = 165
x = 11
!!SOMEBODY PLEASE HELP ME OUT!!
What is the slope of the line??
Answer:
i think it's -1 / -1
nut i'm not sure so if its wrong then sorry , and don't thank's me...
the sum of three terms in a GP is 14 and the sum of their squares is 84, find the terms
Answer:
The terms are 2, 4, and 8
Step-by-step explanation:
a+b+c=14
a^2+b^2+c^2=84
Plug in numbers.
3+6+5=14
3^2+6^2+5^2=70
This is too little, meaning the some of the terms have to be larger.
1+7+6=14
1^2+7^2+6^2=86
This is too much, meaning smaller terms are needed.
2+8+4=14
2^2+8^2+4^2=84
This is perfect.
x² – 2xy + y², x² + 2xy + y², 4x² – xy + y², x² – y²
Answer:
[tex]\left(4x^2-xy+y^2\right)\cdot \left(x+y\right)^2\cdot \left(x-y\right)^2\\[/tex]
Step-by-step explanation:
Mary Alice is making a curtain for her kitchen window. She bought 2 1/12 yards of fabric. Her total cost was $16.
What is the COST PER YARD?
Answer:
7.68$
Step-by-step explanation:
2+(1/12)=2.08
16/2.08=7.68
Answer:
6.4
Step-by-step explanation:
Freddy’s savings account went from $520 to $321 after he purchased a new bike. What was the percent decrease? *
If my calculations are correct, the percentage decrease faced here is roughly 38.2%. Based on the calculations, the bicycle costs 199$ and when the cost is subtracted from 520, you would create the percentage of 38.2%.
A self-storage center has many storage rooms that are 6 ft wide, 10 feet deep, and 12 ft high. What is the volume of the room?
The volume of the storage room is the amount of space in the storage room, and it is 720 cubic feet
The dimensions are given as:
[tex]Width = 6ft[/tex]
[tex]Depth = 10ft[/tex]
[tex]Height = 12ft[/tex]
The volume of the storage room is the product of the dimensions.
So, we have:
[tex]Volume= Width \times Depth \times Height[/tex]
Substitute values for Width, Depth and Height
[tex]Volume= 6ft \times 10ft \times 12ft[/tex]
Multiply the dimensions
[tex]Volume= 720ft^3[/tex]
Hence, the volume of the storage room is 720 cubic feet
Read more about volumes at:
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please help ill mark brainliestO
Answer:
Yes triangles ACB and FGC are similar using AA.
(Please don't hate if it's wrong)
what is the answer and steps to 18(2 − 1) ÷ 3 + 4
The answer is 10, by using pemdas you can just either add, subtract, multiply or divide.
10
Hi! When you see problems like this, always refer to PEMDAS!
P - Parenthesis
E - Exponents
M - Multiplication
D - Division
A - Addition
S - Subtraction
Also note that you go from left to right and parenthesis is always first!
18(2-1)÷3+4
Start with the parenthesis and subtract 2 from 1. That'll leave you with 1.
18(1)÷3+4
Next is multiplication since there are no exponents. Multiply 18 by 1. That'll leave you with 18.
18÷3+4
Now, divide 18 from 3. That'll leave you with 6.
6+4
Finally, you may add the final two. 6 plus 4 is 10.
With that being said, the correct answer is 10.
What is the prime factorization of 24?
1. 2x2x2x3
2. 2x2x3
3. 8x3
4. 6x4
Answer:
1. 2x2x2x3
Step-by-step explanation:
Let's do process of elimination.
2. 2x2x3
2x2=4 4x3=12
2 is false.
3. 8x3
8x3=24
3 is true, but 8 is not a prime number.
4. 6x4
6x4=24
4 is true, but 6 is not a prime number.
This leaves 1. 2x2x2x3.
1. 2x2x2x3
2x2=4 2x3=6 6x4=24
1 is true, and 2 and 3 are prime numbers. So, the answer is 1.
-hope it helps
Answer:
1. 2x2x2x3
Step-by-step explanation:
Prime factorization is defined as a way of finding the prime factors of a number, such that the original number is evenly divisible by these factors.
[tex]24\:\mathrm{divides\:by}\:2\\\\\quad \:24=12\cdot \:2[/tex]
[tex]12\:\mathrm{divides\:by}\:2\\\\\quad \:12=6\cdot \:2[/tex]
[tex]6\:\mathrm{divides\:by}\:2\quad\\\\ \:6=3\cdot \:2[/tex]
[tex]2, 6\:\mathrm{divides\:by}\:2\quad \\\\\:6=3\cdot \:2[/tex]
The price of an item has risen to $152 today. Yesterday it was $95. Find the percentage increase.
Answer:
60% increase
Step-by-step explanation:
152 - 95 = -57
57 / 95 = 0.6
0.6 x 100 = 60
WILL GIVE BRAINLIEST THANK AND FIVE STAR!
Which equation is equivalent to 32x−4y+1=0?
y=4x−1y is equal to 4 x minus 1
y=−38x−14y is equal to negative 3 eighths x minus 1 fourth
y=38x+14y is equal to 3 eighths x plus 1 fourth
y=−4x+1
Answer:
y=−38x−14y is equal to negative 3 eighths x minus 1 fourth is the answer.
Write the missing volues to make these equivalent fractions correct.
2/3 = 4/ = /12
Answer:
2/3 = 4/6 = 8/12
Step-by-step explanation:
How much pure alcohol must a pharmacist add to 10 cm of a 10% alcohol solution to strengthen it to a 70% solution? ASAP
20 cm³ of pure alcohol is added to 10 cm of a 10% alcohol solution to strengthen it to a 70% solution.
Let x represent the volume of pure alcohol (100%) in cm³ needed to be added. Hence:
x * 100% + 10 cm³ * 10% = 70% * (x + 10 cm³)
x * 1 + 10 * 0.1 = 0.7 * (x + 10)
x + 1 = 0.7x + 7
x - 0.7x = 7 - 1
0.3x = 6
x = 20 cm³
Therefore 20 cm³ of pure alcohol is added to 10 cm of a 10% alcohol solution to strengthen it to a 70% solution.
Find out more on equation at: https://brainly.com/question/13763238
Answer:
20 cm³
Step-by-step explanation:
If A = -3n + 2, and B = 5n - 7, what is the value of A - B, in simplest form?
Answer:
2n-5
Step-by-step explanation:
So you would combine your like terms witch would be -3n+5n which would give you 2n then you would do 2-7 and get -5 then you get you answer 2n-5
The value of (A - B) in the simplest form is (A - B) = -8n + 9.
What is an equation?Two or more expressions with an equal sign are defined as an equation.
The given equations are A = -3n + 2 and B = 5n - 7.
The value of A - B is:
A - B
= -3n + 2 - (5n - 7)
= -3n + 2 - 5n + 7
= -8n + 9
Hence, the value of (A - B) in the simplest form is (A - B) = -8n + 9.
Learn more about equations here:
https://brainly.com/question/10413253
Sofia walks from her house to the park. She reaches the park at 5 5 : : 25 25 . If it is a 40 40 -minute walk, what time did she leave her house?
Answer:
4:45
Step-by-step explanation:
hope this helps
A washer and a dryer cost $686 combined.The washer cost $64 less than the dryer.What is the cost of the dryer?
Answer:
Step-by-step explanation:
375
Step-by-step explanation:
the washer cost is 311 the dryer 375
A 15 kg ball is thrown into the air. It is going at 4m/s when thrown. How much potential energy will it have at the top?
Answer:
A ball is thrown vertically upward with a speed of 25.0 m/s
Determine whether each sequence is arithmetic, geometric, or neither. Explain
-6, -3, 0, 3, ...
Answer:
Its arithmetic because it's being added 3 each time.
Answer:
Arithmetic
Step-by-step explanation:
Arithmetic refers to addition and subtraction. Geometric refers to multiplication and division.
In this instance, the sequence has a common difference of 3 (3 is added as the sequence continues).
which shape has 2 parallel sides ready
Answer:
You have two sets of parallel sides. A square has two sets of parallel sides, and it has the extra condition that all of the angles are right angles. So a square is definitely going to be a rhombus. Now, all rhombuses have four sides.
Step-by-step explanation:
Answer:
A Parallelogram
Step-by-step explanation:
What is 6.995 to a decimal, fraction, and percent?
Answer:
1399/200 699.5%
Step-by-step explanation:
1. 6.995 is already a decimal.
2. As a fraction it is [tex]\frac{1399}{200}[/tex] and as an improper fraction it would be 6 [tex]\frac{199}{200}[/tex].
3. As a percent it would be 669.5%.
what are the values? f(3)
Answer:
it's simply what we follow and respect like we value our culture
Step-by-step explanation:
hope this will help
3 3/4 divided by 1 1/3 in fraction answer
Answer: 4/3
Step-by-step explanation:
Please solve i need help :,) tyy
Answer:
6. 47
7. –25
8. 15
9. –33
10. –9
Step-by-step explanation:
Substitute.
6. x=-7
y = -8x - 9
= -8(-7)-9
= 56-9
y=47
7. x=2
y= -8x-9
= -8(2)-9
= -16-9
y= -25
8. x=-3
y= -8x-9
= -8(-3)-9
=24-9
y= 15
9. x=3
y= -8x-9
= -8(3)-9
= -24-9
y= -33
10. x=0
y= -8x-9
= -8(0)-9
= 0-9
y= -9
/I could use some help i dont know this
Answer:
4.5+19.75=24.25
Step-by-step explanation:
rico wants to buy a battery operated toy car which caused 580 7.50 he has already save one 50.00 points his ninong give him 200 point zero zero if he saved 12.50 a day from his allowance how long will it take him to save the rest of money to buy the toy car
Answer:
19 days
Step-by-step explanation:
1 - Make an equation with the variables provided.
150 + 200 + 12.50x = 587.50
2 - Simplify both sides.
350 + 12.50x = 587.50
3 - Subtract 350 from both sides.
12.50x = 237.50
4 - Divide by 12.50 to find your x variable.
x = 19 days
Brainliest would be appreaciated! :-)
please help i only have a few minutes left!!
Answer:
VI
Step-by-step explanation:
The letter "A" is a vowel and a capital letter, so this should be categorized in group VI, where the vowel circle and the capital letter circle overlap.
Answer:
F
Step-by-step explanation:
It is a capital letter and a vowel
The dot product of u ∙ u = 45 what is the length of u?
Answer:
67 hah why you solve this
[tex]\textbf{u} \cdot \textbf{u} = 45\\\\\implies |\textbf{u}|^2 =45\\\\\implies |\textbf{u}| = 3\sqrt{5}[/tex]
