Mathematics, 07.11.2019 09:31 lucky1940

Ineed : -) mark has 64 paintings. the first day he sells 1/4th of them, then on each day after that, he sells one-half of the paintings he started the day with. how many paintings does mark have left after four days of selling his paintings?

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Answer from: ghst

Paintings does Mark have left after four days of selling his paintings are 6.

Step-by-step explanation:

Given : Mark has 64 paintings.

To find : How many paintings does Mark have left after four days of selling his paintings?

Solution :

Total number of paintings = 64

The first day he sells $\frac{1}{4}$ th of them,

i.e. $\frac{1}{4}\times 64=16$

Number of painting left 64-16=48.

The second day he sells one-half of the paintings he started the day with.

i.e. $\frac{1}{2}\times 48=24$

Number of painting left 48-24=24.

The third day he sells one-half of the paintings he started the day with.

i.e. $\frac{1}{2}\times 24=12$

Number of painting left 24-12=12.

The fourth day he sells one-half of the paintings he started the day with.

i.e. $\frac{1}{2}\times 12=6$

Number of painting left 12-6=6.

Therefore, paintings does Mark have left after four days of selling his paintings are 6.

Answer from: Quest

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step-by-step explanation:

Answer from: Quest

correct choice is b

step-by-step explanation:

when you calculate the average rate of change of a function, you are finding the slope of the secant line between the two points. for the function $y=f(x)$ the average rate of change from point $a(a,f(a))$ to point $b(b,f(b))$ can be calculated as

$\text{average rate of change}=\dfrac{f(b)-f(a)}{b-a}.$

to find the average rate of change from day 2 to day 10, note that at day 2, 8 houses were sold, so a(2,8) and at day 10, 2 houses were sold, so b(10,2). thus,

$\text{average rate of change}=\dfrac{2-8}{10-2}=\dfrac{-6}{8}=-\dfrac{3}{4}.$

The graph below shows the number of houses sold over x days. what is the average rate of change from

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