4) A junior high school established a school savings account, and the eighth grade saved $990. If this was 45% of the total amount saved by the school, find the total amount.
a. 5 1/8 
b. 10 
c. none of these 
d. 20% 
e. $.45 
f. 16 3/4% 
g. $2,200 
h. 1,600 miles 
i. 79 
j. -9