Explanation:
11) A
The ratio of texts sent to calls made was 8:5.
12)
Noah 4 scoops of powder with 6 cups of water
4/6*100%=66.67%
Andre mixes 5 scoops of powder with 8 cups of water.
5/8*100%=62.5%
it can be seen that Noah's mixture have a stronger orange taste with a concentration of 66.67% while andre's mixture has a concentration of 62.5%.