Rafael practices the violin for 3/4 hour each dah. he has recital in 3 days. how much time will he practice in 3 days

2 hours 15 min

Step-by-step explanation:

3/4 * 3 = 2.25

= 2 hours 15 min

answer: dead jah

step-by-step explanation:

bullet + jah= dead jah

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