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ZanzabumX [31]
2 years ago
5

A manager at a shopping mall counts 244 males and n females as they enter the mall. The manager realizes that 25% of all males a

nd 25% of all females are children. She writes the expression 0.25n + 61 to represent the number of children who enter the mall. Is the manager correct?
Mathematics
1 answer:
san4es73 [151]2 years ago
5 0

Answer:

Step-by-step explanation:

The manager is not correct in her calculation.

Step-by-step explanation:

There are 244 males and n females who entered the mall as the manager at the shopping mall counts.

If 25% of all males are children, then the number of male children are .

Again, the 25% of all female are children, then the number of female chilfren are .

Therefore, the total number of children will be (60 + 0.25n).

But the manager gives the number of children to be 0.25n + 61 who entered the mall.

So, the manager is not correct in that calculation. (Answer)

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<h3>What is compound interest?</h3>

Interest on interest, or compound interest, is the adding of interest to the principle sum of a loan or deposit. It's the outcome of reinvesting interest rather than paying it out, so that interest is received on the principal plus previously collected interest in the next quarter.,

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

where A is the final amount

P is the principal amount

r is the rate of interest

n is the number of times interest is charged in a year

t is the number of years

Given the principal amount is $7,000 while the rate of interest is 3% which is compounded annually.

A. The amount of money in the account after 2 years will be,

A = $7000(1 + 0.03)² = $7426.30

B. The amount of interest earned is will be,

The amount of interest earned = $7426.30 - $7000 = $426.30

Hence, the amount of money in the account after 2 years is $7426.30, while the interest earned in 2 years is $426.30.

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4 0
2 years ago
A retailer buys a coat in bulk at a unit price of $45. The coat is marked up to 28% to sell in the store. What is the price of t
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Answer:

57.60

Step-by-step explanation:

If the coat is marked up 28%, then the cost is increased by 28% to produce the selling price.

SP = 45 + 28/100 * 45

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Answer: The selling price is 57.60

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4 years ago
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Mariah's earnings rate can be described in dollars per hour or hours per dollar. Mariah earns $10 for each hour she works at a m
weeeeeb [17]

Answer:

<u>dollars per hour rate = $10</u>

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Step-by-step explanation:

Take note that one is singular (dollar) without an 's', and the other is plural (dollars). Thus, since her dollars per hour rate tells us how much she will earn for each hour of work, we would expect her hours per dollar rate to tell us how much she has to work in minutes to earn a single dollar ($1).

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