Jamie and frank went to the neighborhood pool for two hours they swam in the pool for forty-five minutes played on the water slides for 35 minutes and played sand volleyball for the rest of the time what percent of the time did they play sand volleyball A. 40% B. 33 1/3% C. 30% D. 66 2/3%

B. 33 1/3%

Step-by-step explanation:

The total time, they played in the pool,

t = 2 hours =2x60= 120 minutes.

The time in which, they swam in the pool, minutes.

The time in which, they played on the water slides, minutes.

They played sand volleyball for the rest of the time.

Let be the time in which, they played sand volleyball.

So, the total time=

Using the given values, we have

minutes

The percentage of time for which they played volleyball

Hence, option (B) is correct.

answer: 204

step-by-step explanation:

we are told that the revenue is

x⋅(4080−10x)=−10x^2+4080x

this is a quadratic function, so to maximize it we should find the x-value of its vertex. recall that the x-value of the vertex of the parabola ax^2+bx+c is given by the formula −b/2a.

so in this case, we have a=−10 and b=4080, so the x-value of the vertex is

−b/2a= −(4080)/2(−10)=204

49/6 is going to equal 8 1/6