Answer:
All except the second, third, fourth and seventh option.
Step-by-step explanation:
Scientific notation is always a number more than or equal to 1, less than 10 multiplied by 10 to a power. Anything else is considered wrong.
x•10^n while 1<=x<10
Take the total (1200) and divide it by the base number (8) and then multiply by how many there are in the ratio (5)
1200/8= 150 150*5=750
750 students are 25+
The total charges for the first club as a function of the number of rentals (x) are
... f1 = 25 + 2.50x
The total charges for the second club are
... f2 = 3.25x
We want to find x so that f1 < f2.
... f1 < f2
... 25 + 2.50x < 3.25x
.. 25 < 0.75x . . . . . . . . . . subtract 2.50x
... 25/0.75 < x . . . . . . . . . divide by the coefficient of x
... 33 1/3 < x
You must rent 34 videos or more to make the first club more economical.
