Tommy teacher wants to analyze the weights of the students at his school. he knows the weight of the students is normally distributed so he can use the standard normal distribution. he measures the weight of 100 randomly selected students in the school. he finds the mean is 80 pounds and the standard deviation is 8 pounds.
out of 100 students, how many should weigh between 64 and 96 pounds?

3; 9 is 8 to -4

step-by-step explanation:

∠cbe and ∠deb are same-side interior angles.

i took the test

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.

c.

step-by-step explanation: