About 99.7% of sixth-grade students will have
heights between inches and inches. the mean is 58 inches and standard deviation is 2.3 inches.

About 99.7% of sixth-grade students will have

heights between 51.1 inches and 64.9 inches.

Step-by-step explanation:

According to the empirical rule, 99.7% of data falls within the three standard deviations from the mean.

Given : Mean:

Standard deviation:=  

Then, the  99.7% of sixth-grade students will have  heights between

inches and inches

i.e. inches and inches

i.e. 51.1 inches and 64.9 inches.

the ratio of grapes to blueberries she should use is 12: 3

step-by-step explanation:

if mandie is making 15 cups of fruit salad, the ratio of grapes to blueberries she should use is 12: 3.