Answer:
c=9.534
Step-by-step explanation:
Dollars
-----------
Students
Dollars: 95 x
--------------------- = ------
Students: 20 162
Cross multiply: 95(162) = 20x
15,390 = 20x
----------------------
20 20
769.5 = x
Therefore, it will cost $769.50 for 162 students to visit an aquarium.
68% of the data will be within one standard deviation of the mean, so 68% of delivery times will be at least 27-3=24 and at most 27+3=30.
Let length be x feet
length= x
width=x-4
area = 32
length * width=32
x(x-4)=32
x^2 - 4 x -32=0
(x-8)(x+4)=0
x=8 feet
length=8 feet
width=4 feet
perimeter=2(len+wid)
=2(8+4)
2*12=24 feet
Answer:
$75.65
Step-by-step explanation:
$79.78 is discounted 12%. 12% of 79.78 is 9.57
79.78 - 9.57 = 70.21
Tax of 7.75% = 0.0775 x 70.21 = 5.44
70.21 + 5.44 = 75.65