Use the dropdowns below to correctly described the triangles

Evaluate the expression for the given value of the variable 7a - 4a for a =8

If a 36 inch yardstick casts a 21 foot shadow, how tall is a building whose shadow is 168 feet? what is the scale factor

Sally deposited money into a savings account paying 4% simple interest per year.the first year,she earned $75 in interest.how much interest will she earn during the following year?