Answer:
A = 907.46
Step-by-step explanation:
C = πd
34π = πd
d = 34
r = 17
A = = 3.14(
) = 3.14(289) = 907.46
What is the missing length?
2 answers:
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Suppose that Carol has x 10p coins in her purse. Since she has three times as many 20p coins as 10p coins, then she has 3x 20p coins in her purse.
x coins of 10p value $0.10x and 3x coins of 20p value $0.60x.
In total this amount of money is $(0.10x+0.60x)=$0.70x that is exactly $4.20. Thus, you get the equation
0.70x=4.20.
Solve it:
Carol has 6 coins of 10p and 3·6=18 coins of 20p.