Which number line and expression show how to find the distance from -4 to -1

Answer asap evaluate 4-0.25g+0.5h4−0.25g+0.5h when g=10g=10 and h=5h=5.

When george started his current job, his employer told him that at the end of the first year, he would receive two vacation days. after each year worked, his number of vacation days will double up to five work weeks (25days) of payed vacation. how many vacation days will he have in 4 years

Compute the standard deviation of the following set of data to the nearest whole number. 10, 10, 15, 20, 25