3 years ago

Wendy buys a dress that costs $30.00 she pays 8% sales tax

Mathematics

1 answer:

aliya0001 [1]3 years ago

5 0

Answer:

She pays $2.40 in sales tax

Step-by-step explanation:

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3 years ago

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Suppose the population of a town is 127,000 in 2014. The population increases at a rate of 5.2 percent every year. What will the

Dmitry [639]

Answer:

172,146

Step-by-step explanation:

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3 years ago

Write the expression in complete factored form.

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Factor the polynomial.

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3 years ago

What is the value of x ?

Lostsunrise [7]

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3 years ago

A right cone has radius 9cm and slant height 12cm. The radius and slant height are both multiplied by 2/3. Which of the followin

Olegator [25]

Answer:

The surface area is multiplied by 4/9.

Step-by-step explanation:

Surface Area of a Cone

Being r the radius and l the slant height of a cone, then its surface area is

$SA=\pi r^2+\pi r l$

Now let's think both the radius and the slant height are multiplied by the same factor k, i.e.

r'=kr

l'=kl

The new surface area is

$SA'=\pi r'^2+\pi r' l'=\pi (kr)^2+\pi \cdot kr\cdot kl=k^2\pi r^2+k^2\pi rl$

$SA'=k^2(\pi r^2+\pi rl)=k^2\cdot SA$

The new surface area is the $k ^2$ times original SA. Since k=2/3, then

$SA'=4/9\ SA$

The surface area is multiplied by 4/9.

6 0

3 years ago