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antiseptic1488 [7]
2 years ago
14

A batter hits a baseball into the air. the height of the ball, in feet, is modeled by the quadratic function h(t), where t repre

sents time, measured in seconds. use the graph to determinate which of the following statements most accurately models the number of seconds it takes for the abll to hit the ground.
HEEELP

Mathematics
1 answer:
velikii [3]2 years ago
4 0

Answer:

C. h(9.8)=0

Step-by-step explanation:

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Which statement is false?
oee [108]
I believe it’s the last one
7 0
3 years ago
A solution to the system y = 2x 7 and x +y= 5? Why or why not​
andrezito [222]

Answer:

given that, y=2×7

y=14

and

x+y=5

x+14=5

x=5-14

x=9

x not equal to 5

5 0
2 years ago
The difference between a number x and 3 is at least nine Write an inequality for the following sentence.
dybincka [34]

Answer:

3 - x ≥ 9

Step-by-step explanation:

At least in inequality means greater than or equal to (≥)

Difference in mathematics means subtraction

The difference between a number x and 3

3 - x

is at least nine

3 - x ≥ 9

The inequality for the sentence is

3 - x ≥ 9

6 0
3 years ago
A study sampled 350 upperclassmen (Group 1) and 250 underclassmen (Group 2) at high schools around the city of Portland. The stu
iVinArrow [24]

Answer:

-0.061 < P_1 -P_2< 0.025

Step-by-step explanation:

Give data:

n_1 = 350

n_2 =250

x_1 = 23

x_2 = 21

\hat{P} 1 = \frac{x_1}{n_1} = \frac{23}{350} = 0.066

\hat{P} 2 = \frac{x_2}{n_2} = \frac{21}{250} = 0.084

for 95% confidence interval

\alpha = 1 - 0.95 = 0.05 and \alpha/2 = 0.025

z_{\alpha/2} = 1.96  from standard z- table

confidence interval for P_1  and P_2 is

\hat{P} 1 - \hat{P} 2 \pm z_{\alpja/2} \sqrt{\frac{\hat{P} 1(1-\hat{P} 1)}{n_1} +\frac{\hat{P} 2(1-\hat{P} 2)}{n_2}}

(0.066 - 0.084) \pm 1.96 \sqrt{\frac{0.066(1-0.066)}{350} +\frac{0.084(1-0.084)}{250}}

-0.018 \pm 0.043

confidence interval is

-0.018 - 0.043 < P_1 -P_2

-0.061 < P_1 -P_2< 0.025

7 0
3 years ago
Find the value of y.
Ksivusya [100]

Answer:

y = 2

Step-by-step explanation:

20y - 21 = 10y - 1

20y = 10y + 20

10y = 20

y = 2

7 0
3 years ago
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