A random sample of scores on a recent test were selected and recorded below. 68, 71, 77, 82, 85, 88, 89, 90, 92, 93, 96, 99

Calculate the mean and standard deviation for the data set. Round your answers to 3 decimal places.

Sample mean: x Overbar =
⇒
Sample standard deviation: sx =
⇒

both equations and proportions are better.

51

step-by-step explanation:

73-22=51 the   mass number minus the amount of protons gives you the amount of neutrons

answer: howdy

step-by-step explanation:

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.