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belka [17]
1 year ago
12

PLEASE HELP ME PLS ITS MATH

Mathematics
1 answer:
Ganezh [65]1 year ago
7 0

Answer:

9

Step-by-step explanation:

We know that

h(t)=-16t^2+1296

The balls hits the ground when h(t)=0, so

-16t^2 + 1296=0 \\ \\ t^2 - 81=0 \\ \\ t^2 = 81 \\ \\ t=9

Note I only considered the positive case because time must be positive.

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A fair coin is flipped seven times. what is the probability of the coin landing tails up at least two times?
GaryK [48]

The required probability of the coin landing tails up at least two times is 15/16.

Given that,
A fair coin is flipped seven times. what is the probability of the coin landing tails up at least two times is to be determined.

<h3>What is probability?</h3>

Probability can be defined as the ratio of favorable outcomes to the total number of events.

Here,
In the given question,
let's approach inverse operation,
The probability of all tails  = 1 / 2^7 because there is only one way to flip these coins and get no heads.
The probability of getting 1 head = 7 /2^7
Adding both the probability = 8 / 2^7
Probability of the coin landing tails up at least two times = 1 - 8/2^7
                                                                                     = 1 - 8 / 128
                                                                                     = 120 / 128
                                                                                     = 15 / 16

Thus, the required probability of the coin landing tails up at least two times is 15/16.

Learn more about probability here:

brainly.com/question/14290572

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7 0
1 year ago
Which statement is true? Select all that apply.
julsineya [31]
It’s b and c and i believe a
3 0
2 years ago
Find the area of this figure. use 3.14 for pi.​
Ganezh [65]
The square would be 100.
The semicircle you will use the formula πr^2/2.
That would mean you would take the 3.14x5^2/2.
(3.14x5x5)/2
(3.14x25)/2
78.5/2
=39.25
So the total area would be 139.25
7 0
3 years ago
What is the domain and range of y=lxl
Gelneren [198K]
I think 0.9733 for both
5 0
3 years ago
Molly earns a rebate each month on her movie tickets and books. She earns $0.25 for each movie ticket and $2 for each book. Last
svetoff [14.1K]

Answer:

Step-by-step explanation:

A

lets say   t is each ticket

and b is each book

0.25t + 2b = 17 that is for both

for just books

2b = 17

7 0
2 years ago
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