SOLUTION: 1. Given that the number 5913d8 is divisible by 12, what is the sum of all the digits that could replace d? 2. The ratio of onions to radishes in a tossed salad is 8 to 5. If th

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Question 572946: 1. Given that the number 5913d8 is divisible by 12, what is the sum of all the digits that could replace d?
2. The ratio of onions to radishes in a tossed salad is 8 to 5. If the number of onions is decreased by 20 percent and the number of radishes is increased by 20 percent, what is the new ratio of onions to radishes? Express your answer as a common fraction.
3. Points A(2,5) and B(10,5) are the endpoints of a diameter of a circle graphed in the coordinate plane. How many square units are in the area of the circle? Express your answer as a multiple of π.

Answer by ankor@dixie-net.com(22740) (Show Source):
You can put this solution on YOUR website!
1. Given that the number 5913d8 is divisible by 12, what is the sum of all the digits that could replace d?
Only d=4, will give a number that is a multiple of 12
:
2. The ratio of onions to radishes in a tossed salad is 8 to 5.
If the number of onions is decreased by 20 percent and the number of radishes is increased by 20 percent, what is the new ratio of onions to radishes?
Express your answer as a common fraction.
The multiplier for a decrease of 20% = .8
the multiplier for an increase of 20% = 1.20
= *10 = =
:
3. Points A(2,5) and B(10,5) are the endpoints of a diameter of a circle graphed in the coordinate plane.
How many square units are in the area of the circle?
Express your answer as a multiple of .
:
we can find the diameter of the circle by using the distance between two points formula
d =
x1=2; y1=5
x2=10; y2=5
However since y1 and y2 = 5, we know it is a horizontal line
The distance: 10-2 = 8 is the diameter of the circle
radius = 4
:
A =
A = sq/units