MaxWong

pls provide a photo or type the question directly on the forum because the link is unavailable

I suppose you mean 800/2

800/2 = 400

(7/9*pi)8

=56pi/9

which approx. equals 19.54768762

$\frac{(4)(\pi)(4.7)^3}{3}=652.3 in^3$

$2x-\frac{5}{3}=13$

$x=\frac{13+\frac{5}{3}}{2}$

which equals 22/3

(2√5)²

= 2² x √5²

= 4 x 5

= 20

Hello.

Welcome to Web2.0Calc

cosine (angle) = adjacent / hypotenuse

inverse cosine (adjacent/hypotenuse) = (angle)

6-(-4)

=6+4

=10

$2(2x\times y)= 2(2xy) = 4xy$