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n200080 [17]
3 years ago
14

A rock is dropped from a height of 100 feet calculate the time between when the rock was strong and when he landed if we choose

down as positive and ignore air friction the function is h(t)=16t^2-100
Mathematics
2 answers:
mel-nik [20]3 years ago
7 0

Answer:

2.5s

Step-by-step explanation:

We are given a function which tells us at what time the rock is at a certain height. What should be the height of this function when the rock hits the ground? 0, because it has no height, it's on the ground!

So let's plug in 0, and see what value we get for the time.

0 = 16t^2-100\\100 = 16t^2\\\frac{100}{16} = t^2\\

To solve for t we need to take the square root of both sides.

t = \sqrt{\frac{100}{16} } = \frac{10}{4} = 2.5s

Nady [450]3 years ago
6 0
2.5s (got the same question hope this helps :3)
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the head of a nail is circular , as shown the head of this nail has a diameter of 6 millimeters what measurment is closet to the
Nikitich [7]

Answer:

Area of nail's head  = 28.26 millimeter² (Approx.)

Step-by-step explanation:

Given:

Head of nail is circular

Diameter of nail's head = 6 millimeter

Find:

Area of nail's head

Computation:

Radius of nail's head = Diameter / 2

Radius of nail's head = 6 / 2

Radius of nail's head = 3 millimeter

Area of circle = πr²

Area of nail's head  = πr²

Area of nail's head  = (22/7)(3)²

Area of nail's head  = (22/7)(9)

Area of nail's head  = (3.14)(9)

Area of nail's head  = 28.26 millimeter² (Approx.)

5 0
2 years ago
Mental Math A typical tip in a restaurant is 15% of the total bill. If the bill is $110, what would the
Katarina [22]

Answer:

$16.50

Step-by-step explanation:

15/100*110

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3/2*11

33/3

16.50

7 0
2 years ago
Please help me out :( I would appreciate it so much
Sophie [7]

Answer: B

Step-by-step explanation: Explanatory means to explain, or provide information. Argumentative tries to prove a claim is correct

I hope this helps you! :)

3 0
3 years ago
6x - 170 = -4x + 110​
strojnjashka [21]

Answer:

=-110

Step-by-step explanation:

:)

7 0
3 years ago
8z=4(2z+1) show step by step
Verizon [17]
8z=4(2z+1)
First you would distribute the constant into the numbers in the parentheses. so
8z=8z+4
then you would combine like terms which in this case would result in a zero.
8z-8z=0 So the z would be zero or no solution.
5 0
3 years ago
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