A15 foot building casts a 9 foot shadow. how tall is the building that casts a 30 ft shadow at the same time

Ineed to know the answer to this algebra question.

Beth divided 9 ounces of her granola recipe into 4 equal-sized amounts. she placed the amounts into individual bowls. the fraction 9/4 represents the number of ounces of granola in each bowl. which other number represents the amount of granola beth has in each bowl? (a) 1 1/4 (b) 2 1/4 (c) 1 3/4 (d) 3 3/4 i need !

What is the unit rate of, 75% high fiber chimp food to 25% high protein chimp food.