hi I need help with this question

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16

Apatient is to be given 35 milligrams of demerol every 4 hours. you have demerol 50 milligrams/milliliter in stock. how many milliliters should be given per dose?

Present age of man is 45 years, 5 years back his age was 4 times age of his son what is present age of his son?