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2 years ago

F(x) =-6-3x/2. g(x)=2x+4

Mathematics

1 answer:

Advocard [28]2 years ago

7 0

Answer:

correct

Step-by-step explanation:

my brain be smart

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A toy rocket is launched from a platform 42 feet above the ground at a speed of 91 feet per second. The height of the rocket in

True [87]

Lets get started!

height = -16t² + 91t + 42
After 3 sec means, t = 3, so we substitute t with 3

H = -16(3)² + 91(3) + 42
= -144 + 273 + 42
= 171 feet

3 0

3 years ago

A sprinkler system is being installed in a newly renovated building on campus. The average activation time is supposed to be at

melomori [17]

Answer:

A) t = 1.73

B) p-value = 0.0558

C) Data is not statistically significant because the p-value of 0.0558 is more than the significance value of 0.05

D) The decision means that the design specifications are not met.

E) Type II error

Step-by-step explanation:

The hypotheses are:

H₀: μ = 20

H₁: μ > 20

A) Formula for the test statistic is;

t = (x' - μ)/(s/√n)

Now, we are given;

x' = 21.5

μ = 20

s = 3

n = 12

Thus;

t = (21.5 - 20)/(3/√12)

t = 1.73

B) we have our t-value as 1.73

Now, Degree of freedom(DF) = n - 1

So,DF = 12 - 1 = 11

Using significance level of α = 0.05, t-value = 1.73 and DF = 11, one tailed hypothesis, from online P-value calculator attached, we have;

p-value = 0.0558

C) Data is not statistically significant because the p-value of 0.0558 is more than the significance value of 0.05

D) We will not reject the null hypothesis. The decision means that the design specifications are not met.

E) If the true average activation time of the sprinkler system is, in fact, equal to 20 seconds, then the null hypothesis is false.

Since we did not reject the null hypothesis even though it is false, the error that was committed was therefore a type II error.

4 0

2 years ago

I REALLY NEED HELP!!!

Darya [45]

Answer:

see below

Step-by-step explanation:

Each reflection is along a line through the other focus of the conic. The two foci of the parabola are the one shown and the one at infinity (the source of light rays).