How many natural numbers n satisfy the inequality: 1/7 < n/10 < 4/5 ?

Me asap! what is the slope of this line? enter your answer in the box.

Yvaries directly as x. y =90 when x=6. find y when x=13

Ameteorologist is studying the monthly rainfall in a section of the brazilian rainforest. she recorded the monthly rainfall, in inches, for last year. they were: 10.4, 10.3, 11.7, 11.1, 8.0, 4.4, 2.6, 1.8, 2.5, 4.4, 7.3, 9.5 fill in the missing values in the formula. what is the variance?