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worty [1.4K]
3 years ago
12

A ball is dropped from a ledge, and its height is given by the formula ℎ = −16t + 15t + 1050. How long will it take to hit the g

round?
Mathematics
1 answer:
nlexa [21]3 years ago
6 0

Answer:

1050 s

Step-by-step explanation:

When the ball hits the ground, height will be zero hence the time taken, considering the equation given as ℎ = −16t + 15t + 1050.

Substituting 0 for h then

0 = −16t + 15t + 1050

-t+1050=0

t=1050

If the formula was in terms of seconds then the time is 1050 seconds

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Answer and explanation:

Null hypothesis(H0) says sentiment for increasing speed limit in the two populations is the same

Alternative hypothesis(Ha) says sentiment for increasing speed limit in the two populations is different

Where p1 is the first population proportion =65/297= 0.22

And p2 is the second population proportion = 78/189= 0.41

P= p1+p2/n1+n2= 65+78/297+189= 0.29

Hence H0= p1-p2=0

Ha=p1-p2≠0

Test statistic= p1-p2/√p(1-p) (1/n1+1/n2)

= 0.22-0.41/√0.29(1-0.29)(1/297+1/189)

= -4.49

Critical value at 95% significance level= 1.96( from tables)

We therefore reject null hypothesis as critical value is greater than test statistic

Therefore the sentiment for increasing speed limit in the two populations is different

b. at proportions of 0.24 and 0.40 for p1 and p2 respectively

Test statistic = 0.24-0.40/0.29(1-0.29)(1/297+1/189)

= -3.78

P value is 0.0002 at 0.05 significance level

Hence probability =0.4998

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3 years ago
What 89337 times 8<br><br> A-888998<br><br> B-903842<br><br> C-714696<br><br> D-847839
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Answer:

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Step-by-step explanation:

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I believe the answer is 2. i hope this helps
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Answer:

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Step-by-step explanation:

Complementary angles:

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The only angle (that's an answer choice) that helps form a right angle with angle 2 is angle 1, thus making it the correct answer.

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4 0
2 years ago
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Answer:

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