Avideo store has 20 copies of a movie that each rent for $3 a day. if 75% of these copies are rented on one and 90% of these copies rented the next day how much money was collected from renting this movie on both days

Money collected from renting the movies on both days = $99

Explanation:

We are given that the total number of copies is 20 and that the rent of each is $3 a day

1- On the first day:

Number of copies rented = 75% of the number of copies

Number of copies rented = 0.75 * 20 = 15 copies

Money made from renting the copies on first day = 15 * 3 = $45

2- On the second day:

Number of copies rented = 90% of the number of copies

Number of copies rented = 0.9 * 20 = 18 copies

Money made from renting the copies on second day = 18 * 3 = $54

3- Getting the total amount of money from renting:

Total collected money on both days = 45 + 54 = $99

Hope this helps :)

answer: 1 + 1 = 11

step-by-step explanation:

solution:

the given function is ,

      =

the three roots of this quadratic function is , 0 ,8 and 10.all the roots are real and rational.

if a quadratic equation is of the form ,

sum of the roots = a + b +c= 0+8+10=18=  

product of roots taken two at a time = a b + b c+ c a = 0+80+0=80 =  

product of roots = a b c = 0=  

there are 11 doors in a hall starting from 0 to 11.the entry in the hall is permitted through gate number 0 and exit is allowed through only gate number 8 and 10.so, three roots(0,8,10) of quadratic function is given by entry and exit route of this hall.