PLEASE HELP ME WITH THIS! ASAP!!!!!!!

Mathematics

1 answer:

marusya05 [52]2 years ago

3 0

Hold on i believe its C but let me go look on google and i'll get back to you to sure

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floodwaters are used to prevent damage from floods. A town built a floodwall 4 4/8 feet tall. Another town built a floodwall 7 1

Sveta_85 [38]

It's basic subtraction. you subtract 7 1/8 with 4 4/8 by turning one of the one from the seven to 8/8 and add that to 1/8 so you get 9/8. Then 6 9/8 - 4 4/8 = 2 5/8.

5 0

2 years ago

Vera took 10 tests over a time of 5 weeks. After 9 weeks this quarter, how many tests will Vera have taken?

seropon [69]

Answer:

Step-by-step explanation:

10 tests = x tests

/ 5 weeks = / 9 weeks

10* 9= x5

90/5= 18

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2 years ago

Read 2 more answers

The time needed to complete a final examination in a particular college course is normally distributed with a mean of 80 minutes

mixer [17]

Answer:

0.02275

Step-by-step explanation:

We have been given that the time needed to complete a final examination in a particular college course is normally distributed with a mean of 80 minutes and a standard deviation of 10 minutes. We are asked to find the probability of completing the exam in one hour or less.

We know that 1 hour equals 60 minutes. First of all, we will find the z-score corresponding to 60 minutes.

$z=\frac{x-\mu}{\sigma}$