Suppose that you have an enormous grapefruit that is 92% water (by weight). The grapefruit weights 100 pounds. If the water content of the grapefruit evaporates until it is 90% water (by weight), then approximately how much does the grapefruit now weigh?
Sorry to say,but you're wrong!
You were correct in this:> https://web2.0calc.com/questions/help-asap-thanks_2#r5
I'm gonna use the same calculations for this math problem.
[ 0.92 * 100 - 0.90 (100 - x)] = x ( "x" represents the weight loss)
92 - ( 90 - 0.90x) = x
92 - 90 + 0.90x = x
2 + 0.90x = x
2 + 0.90x - 0.90x = x - 0.90x
2 = 0.1x
x = 20
New weight is 100 - x = 80
Which angles are coterminal with an angle measure of 2π/3 ?
2π/3 - 2π = 2π/3 - 6π/3 = - 4π/3 -4π/3 -2π = -4π/3 - 6π/3 = - 10π/3
2π/3 + 2π = 2π/3 + 6π/3 = 8π/3
Here's a link where you can learn the basic about coterminal positive and negative angles.