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3 years ago

7

David and Mark are marking exam papers. Each set takes David 24 minutes and Mark 1 hour. Express the times David and Mark take a

s a ratio. Give your answer in its simplest form.

1 answer:

sertanlavr [38]3 years ago

5 0

Answer:

2:5

Step-by-step explanation:

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Your friend Sarah invests $2000 in an account when she starts college that pays 6.5% annual interest. How much will be in your f

xz_007 [3.2K]

assuming simple interest.

$\bf ~~~~~~ \textit{Simple Interest Earned Amount} \\\\ A=P(1+rt)\qquad \begin{cases} A=\textit{accumulated amount}\\ P=\textit{original amount deposited}\dotfill & \$2000\\ r=rate\to 6.5\%\to \frac{6.5}{100}\dotfill &0.065\\ t=years\dotfill &4 \end{cases} \\\\\\ A=2000[1+(0.065)(4)]\implies A=2000(1.26)\implies A=2520$

8 0

2 years ago

A company has two manufacturing plants with daily production levels of 5x +14 items and 3x-7 items, respectively. The first pla

Llana [10]

Answer:

The first plant produces 2x + 21 more items daily than the second plant.

Step-by-step explanation:

The daily production of the two plants are:

Plant 1: 5x + 14

Plant 2: 3x - 7

Compute the number of items first plant produces more than the second plant as follows:

$\text{Plant 1 - Plant 2}=5x+14-3x+7\\\\=2x+21$

Thus, the first plant produces 2x + 21 more items daily than the second plant.

3 0

2 years ago

Root of 6x^2 -8 = -8x

Svetlanka [38]

Answer:

If your question is set up like this $\sqrt{6x^2-8}=-8x$ then your answer is No solution.

If your question is set up like this $\sqrt{6x^2}-8=-8x$ then your answer is $x=\frac{4(8-\sqrt{6}) }{29}$ or x = 0.765

Hope this helps!

8 0

3 years ago

. Using the rounding off technique, find the rough estimated difference of the given decimals.

nikitadnepr [17]

Answer:

19. 188

20. 18

21. 5

21. 4

Step-by-step explanation:

634.58 would round up to 635 and 436.79 would round up to 437.

20. 37.86 would round up to 38 and 19.92 would round up to 20.

21. 14.49 would round to 14 and 8.59 would round up to 9.

22. 7.45 would round down to 7 and 2.93 would round up to 3.

3 0

2 years ago

What’s the answer for this question?

loris [4]

Your answer is 16 because you have to multiply b and c but it has to be squared and then you subtract 400 by 144 and get 256 and the square root of that is 16

6 0

3 years ago