There were 21 pumpkins in a garden patch. children picked 4/7 of the pumpkins.

how many pumpkins did the children pick?

a.
7

b.
14

c.
17

d.
18

Apinhole camera is made out of a light-tight box with a piece of film attached to one side and pinhole on the opposite side. the optimum diameter d(in millimeters) of the pinhole can be modeled by d=1.9[ (5.5 x 10^-4) l) ] ^1/2, where l is the length of the camera box (in millimeters). what is the optimum diameter for a pinhole camera if the camera box has a length of 10 centimeters

Which pair of numbers is relatively prime? a. 105 and 128 b. 130 and 273 c. 205 and 350 d. 273 and 333

Urgent? will give brainliest to the first correct answer what is the area of the figure?