1) If Shagreen bought the energy star refrigerator for $1800 and saved $200 every year, how many years would it take for her to save back the

money she spent on the refrigerator?

9

Explanation:

Shagreen bought the energy star generator for $1800

She saves $200/every year

Therefore the number of years it would take for her to save that amount can be calculated as follows

= 1800/200

= 9

Hence it would take 9 years to save up the money

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards