Answer:
is this the only thing it shows on the screen or does it have anything else that goes with the question?
Step-by-step explanation:
Greeting's!
<span>B. 279
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Since there are two halves in a whole, you can times each number by 2 to get the number of halves it has.
12*2=24
10*2=20
13*2=26
15*2=30
8*2=16
5*2=10
If the cakes are circles,
3.14(4)2= 50.24
3.14(5)2= 78.5
78.5-50.24= 28.26
#1 is 28.26
Step-by-step explanation:
remember, 1% = 1/100 = 0.01
4% = 0.04
6% = 0.06
so, we have to find the solution for
90×0.01 + x×0.06 = (90+x)×0.04
with x being the amount needed of the 6% solution.
90×0.01 + x×0.06 = 90×0.04 + x×0.04
90×0.01 + x×0.02 = 90×0.04
x×0.02 = 90×0.03
x = 90×0.03/0.02 = 135 ml
so, we need to add 135 ml of the 6% solution to get in total a 4% solution (90+135 = 225 ml of that).
