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svp [43]
4 years ago
9

The price of an item yesterday was $120 . Today, the price fell to $54 . Find the percentage decrease.

Mathematics
1 answer:
Nesterboy [21]4 years ago
8 0

Answer:

magnitude of decrease = 120 - 54 = 66$

the percentage = (66/100)×100 = 66%

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How many different simple random sampmes of size 5 can be obtained from a pppulation whose size is 43?​
Nesterboy [21]

Answer:

Number of random samples = 962598

Step-by-step explanation:

A random sample represents  the responses for a certain survey of a part of the population.

A sample size is the part of the population being surveyed.

For a population N the number of different random samples that can be chosen for a sample size x can be calculated as = NCx

This can be calculated as :

NCx=\frac{N!}{x!(N-x)!}

Given:

Population size = 43

Sample size = 5

Number of random samples = 43C5

⇒ \frac{43!}{5!(43-5)!}

⇒ \frac{43!}{5!(38)!}

⇒ \frac{43\times42\times41\times40\times39}{5\times4\times3\times2\times1}    [Canceling out the common terms]

⇒  962598   (Answer)

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3 years ago
Amount of sugar in a sugar bowl is 0.75 cups
Mariana [72]
I equals 70 grams cup because
4 0
3 years ago
On Melissa's 6th birthday, she gets a $2000 CD that earns 7% interest compounded quarterly. If the CD matures on her 13th birthd
Alexandra [31]

Answer:

A\simeq3250.83

Step-by-step explanation:

The amount formula in compound interest is:

A=P(1+\frac{r}{n} )^{nt}

where:

P = principal amount

r = annual interest

n = number of compounding periods

t = number of years

We already know that:

P = $2000

r = 7\% = \frac{7\%}{100\%}=0.07

t = 7 (number of years from 6th to 13th bday)

n = 4 (quarterly in a year)

Then,

A=2000(1+\frac{0.07}{4} )^{(4)(7)}\\\\A=2000(1+\frac{0.07}{4} )^{28}\\\\A=3250.825792\\\\A\simeq3250.83

8 0
3 years ago
What is the value of y?
Pavel [41]
Y = (180-72)/2 = 54°
6 0
4 years ago
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Which equation can be used to find the surface area of the cylinder?
atroni [7]

Answer:

I am pretty sure the answer is A.

8 0
3 years ago
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