47) find the area of a circle with diameter of 10 cm. let pi = 3.14.
48) find the area of a circle with radius of 2 cm. let pi = 3.14.

Step-by-step explanation:

note :

the area of a circle  is : A= π×r²    r : radius and : D=2r   ... D : diameter

47) D = 10 cm      r= 10cm/2 = 5 cm

A=π×r²  = 3.1448×5²  =78.62cm²

48) A= 3.1448×2²= 12.58cm²

answer: since the question is talking about growth you have to use the growth formula which is inital amount (1 + growth)^time

step-by-step explanation:

the intial amount is 1200, the growth is 4.8, and the time is 7. plug those numbers into the equation, also i think you have to change 4.8 into a percent. but, i have forgotton how to do that. if this is a online class go on to the lesson.

16.9 times 2.85

step-by-step explanation: