Find the area under the standard normal curve to the left of z=1.25.

1 answer:

3 0

For quite some time now, calculators have had statistical functions built in. Here we need to use the stat. function normalcdf, which has only two inputs when we're working with z scores instead of raw scores.

Here,

normalcdf(-100,1.25) = 0.894

This same result could be obtained using a table of z-scores.

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Can someone help with question 3 pls

e-lub [12.9K]

 $a. \: 11.4$ 

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3 years ago

A person standing cloes to the edge on the top of a 200-foot building throws a baseball vertically upward. The quadratic functio

RoseWind [281]

Answer:

See below in bold.

Step-by-step explanation:

A). s(t)= -16t^2+64t+200

Converting to vertex form.

s(t) = -16 (t^2 - 4t) + 200

s(t) = -16 [(t - 2)^2 - 4] + 200

s(t) = -16(t - 2)^2 + 64 + 200

s(t) = -16(t - 2)^2 + 264

The maximum height is after 2 seconds and it is 264 feet.

B) The ball hits the ground when s(t) = 0 so we have:

-16t^2+64t+200 = 0

x [-64 +/- sqrt (64^2 - 4*-16*200) ] / -32

x = 6.06, -2.06

So the answer is 6.06 seconds.

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3 years ago

If the circulation for newspaper 1 is 382 thousand more than the circulation for newspaper 2 and their combined is 2502 thousand

goldenfox [79]

If the circulation for newspaper 1 is 382 thousand more than the circulation for newspaper 2 and their combined is 2502 thousand find the circulation for each paper

Answer: Let x be the circulation for newspaper 2.

Then the circulation for newspaper 1 is $x +382$ thousand