Can anyone me ?
which expression can be used to find the area of a circle with a diameter of 30 cm?

a. π • 30

b. 2 • π • 15

c. π • 30^2

d. π • 15^2

The ratio of the perimeters of two similar triangles is 4: 3. what are the areas of these triangles if the sum of their areas is 130cm2?

Ineed with the quizzes in apex mathematics ii

At the beginning of the year, adrian's savings account balance was \$28$28. each week, he deposits another \$15$15 into that account, and he doesn't spend any of his savings. is his savings account balance proportional to the number of weeks since the start of the year?