Break apart ones to make a ten use this as a way to add 27+8

Can someone me my sister? she is in third grade. 50 points and brainlist! ones that are not answered. plz and thx!

What is the celsius temperature that is equal to 94 degrees fahrenheit using the formula f=9/5 c+32

How many of the 250 grandparents in the population would you expect to prefer online shopping with merchant a? merchant a: 4 merchant b: 6 merchant c: 2 merchant d: 3 other: 5 none: 5 answer choices: a.about 4 b.about 8 c.about 40 d.about 21