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schepotkina [342]
3 years ago
6

Sarah invested $12,000, part at 5% simple interest and the rest at 7% simple interest for a period of 1 year. How much did they

invest at each rate if each account earned
the same interest?
Mathematics
1 answer:
goblinko [34]3 years ago
7 0

Answer:\

7 percent times5 percent devided by 12,000

Step-by-step explanation:

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Find the whole.<br> 500​% of what number is 4,800​?
alexgriva [62]
Answer: 9.6
Explanation: if 500% is 4800 we would need to divide 4800 by 500 to find 1%
4800/500= 9.6
5 0
3 years ago
Read 2 more answers
2. The ratio of
denpristay [2]

Answer:

<h2>3500</h2>

Step-by-step explanation:

Given the  ratio of  the profit, cost of  materials and labour  in the production of

an article to be 5:7:13 respectively, total ratio = 5+7+13 = 25

If the cost of labour is x, the cost of material will be 840+x (since the  cost of materials is Le  840 more than that of  labour)  .

Let the total cost of producing the article be y.

Cost of labour = 13/25 * y = x

Cost of labour  = 13y/25 = x.................... 1

Cost of material = 7/25*y = 840+x

Cost of material = 7y/25 = 840+x ..................... 2

From 1, 13y = 25x

x = 13y/25 ................... 3

Substituting equation 3 into 2:

7y/25 = 840+x

7y/25 = 840+13y/25

collect the like terms:

7y/25 - 13y/25 = 840

-6y/25 = 840

-6y = 25*840

y = 25*840/6

y = 3,500

<em>Hence the total cost of producing the article is 3500</em>

4 0
3 years ago
Amber baked 243 cookies. She wants to share the cookies evenly among 13 friends in her class. How many cookies will each friend
Arte-miy333 [17]

Answer:

18

Step-by-step explanation:

243÷13=18remainder9

mark me brainliest

8 0
3 years ago
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Suppose that birth weights are normally distributed with a mean of 3466 grams and a standard deviation of 546 grams. Babies weig
Anon25 [30]

Answer:

3.84% probability that it has a low birth weight

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 3466, \sigma = 546

If we randomly select a baby, what is the probability that it has a low birth weight?

This is the pvalue of Z when X = 2500. So

Z = \frac{X - \mu}{\sigma}

Z = \frac{2500 - 3466}{546}

Z = -1.77

Z = -1.77 has a pvalue of 0.0384

3.84% probability that it has a low birth weight

3 0
3 years ago
Which expression is equivalent to 3\tfrac{1}{3}-8\tfrac{2}{3}3
Sholpan [36]

Answer:

and yeah ikr I don't understand why

3 0
3 years ago
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