Answer:
1464 inch²
Step-by-step explanation:
given first prism sides: length - 10 width - 10 height - 10
given second prism sides: length - 12 width - 12 height - 12
using the formula below:
for the first prism:
2(10*10+10*10+10*10)
600 inch²
for the second prism:
2(12*12+12*12+12*12)
864 inch²
So total surface area is (864 inch² + 600 inch²) =1464 inch²
Answer: 1.4
Step-by-step explanation:
Answer:
10%
Step-by-step explanation:
1 is ten percent of 10, and 11-10 = 1. Thus the percent increase in her running time is 10 %
Answer:
a. 87.5%
b. 30 g of 12 carat and 60 g of 21 carat.
Step-by-step explanation:
a. The percentage of gold in 21 carat is given by:
b. Since the mass he wants to produce is 90 g, then the added mass of the 12 carat, "x", and the mass of the 21 carat "y", must be equal to that:
The sum of gold on each carat type must be equal to the amount of gold on the final mixture, since a 12 carat has 50% gold and a 21 carat has 87.5% gold, then we have:
We now have a system of equations which we can solve to find the necessary mass of each type.
He needs 30 g of 12 carat gold and 60 g of 21 carat gold.
A. 10/15
b. 7/8
those r the answers