Given :
On average, a refrigerator door is opened 99 times each day.
Len has two refrigerators in his house.
To Find :
How many times in a 8−week period are the refrigerator doors opened.
Solution :
Number of times door opened for 2 refrigerator , n = 99×2 = 198.
Number of days in 8 week , d = 8×7 = 56 days.
So, total number of times doors open in a period of 8-week is :

Therefore, refrigerator doors are opened about 11088 times.
Hence, this is the required solution.
Volume of prism = 3 1/2 x 3 1/2 x 7 = 85 3/4 cubic inches
90 - 85 3/4 = 4 1/4 ( 4.25) cubic inches difference
So, the equation would be -
1.50x + 10 = 40
and you have to find the value of x
1.50(?) +10 = 40
The value of x would be 20
1.50 x 20 = 30 +10 = 40
Your answer would be that
Daniel can ride up to 20 rides