What is the perimeter of DEF to the nearest tenth?

DFE is a right angle triangle. The length of DE is 18. Angle D is 38 degree and angle E is 52 degree.

A. 19.4

B. 20.1

C. 25.3

D. 43.3

Reflect the point (7,0) across the y-axis

Barbara deposited $300 in the bank. if the bank pays her simple interest at the rate of 4 percent per year, how much money will she have in her account at the end of 9 months?

What is the volume of the cone to the nearest cubic millimeter? (use π  = 3.14) a) 46 mm3 b) 128 mm3 c) 183 mm3 d) 275 mm3 diameter = 5 mm height = 7 mm how do you do this problem step by step?