The AAA Cable Company uses this graph to compare their costs to the costs of a competitor. The competitor charges a $20 installation fee and $1.10 per day. AAA Cable has no installation fee and charges $1.30 per day. Cable Company Rates
A graph titled Cable Company Rates has Time (days) on the x-axis, and Cost (dollars) on the y-axis, from 0 to 45 in increments of 5. A line titled Our cost goes through (4, 5) and (8, 10). A line titled Their cost goes through (0, 20) and (4, 25).

What can be done to make this graph less misleading?

a.
Change the vertical scale to increments of $10 instead of increments of $5.
b.
Change the horizontal scale to increments of 10 days instead of increments of 1 day.
c.
Change the vertical scale to increments of $1 instead of increments of $5.
d.
Change the horizontal scale to increments of One-half days instead of increments of 1 day.

she was supposed to add the hours(38.5) and multiply the amount of money she earned(7.50) resulting in $288.75 .

correct me if i'm wrong and if it is i'm truly sorry.

the solution of the equation is 2.23 ⇒ answer b

step-by-step explanation:

* lets revise the meaning of exponential function

- the form of the exponential function is y = ab^x, where a ≠ 0, b > 0 ,  

  b ≠ 1, and x is any real number

- it has a constant base b

- it has a variable exponent x

- to solve an exponential equation, take the log or ln of both sides,  

  and solve for the variable

* lets solve the problem

∵

- the base is 7 and the exponent is x

- insert ㏑ in both sides

∴

- use the rule

∴ x ㏑(7) = ㏑(77)

- to find x divide both sides by ㏑(7)

∴

* the solution of the equation is 2.23 to the nearest 2 decimal places

d. $180

step-by-step explanation:

if the dimensions of the room is 9ft by 12 ft, we have the area of the floor as,

so the area of the floor is 108 square feet, converting that into square yards we get,

the cost of carpet is $15 per square yard, therefore the cost of carpet for 12 square yards is,

hence, the cost of carpet is $180.

assuming the dimensions of the room be,

15 ft by 12 ft

so, the area of the floor of that room is,

we can convert 180 square feet into square yards, we know that,

1 sq ft = 0.111 sq yard

so, 180 square feet is,

so the area of floor is 20 square yards.

now, the cost of carpet is 15 dollars per square yard, therefore the cost of carpet for 20 square yards is,

so, it will cost $300.