3 years ago

Which of the following statements are true? Select all that apply.

Mathematics

1 answer:

tigry1 [53]3 years ago

8 0

Answer:

a,d

Step-by-step explanation:

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What weight of dry substance is in 150g of a 3% substance solution? What weight of an 8% solution can we have with the same weig

Pavlova-9 [17]

The answers are: 4.5 g and 56.25 g respectively.

Since the first type of measurement in this question is weight or mass, I'll suppose that the percentage concentration is % mass/mass. For that type of concentration measurement, just multiply the percentage by the total mass to get the mass of the wanted material.
So 150 g * 3% = 150 g * 0.03 = 4.5g

For the 8% solution with the same amount of dry substance, use the ratio of percentages, multiplied by the mass of the first solution to get the wanted amount of new solution:
3/8 * 150 g = 56.35 g

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A pair of sneakers cost the store $65. They mark them up by 40%. What is the selling price of the sneakers?

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3 years ago

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Tenley is making a square frame for her painting. She is using 4 pieces of wood that are each 2.75 ft long. How much wood will T

kifflom [539]

Answer:

11 feet.

Step-by-step explanation:

We are told that Tenley is making a square frame for her painting. She is using 4 pieces of wood that are each 2.75 ft long.

To find the total amount of wood used in making the frame we will multiply amount of wood of each piece (2.75) by number of wood piece used to make the frame (4).

$\text{Total amount of wood used to make the frame}=2.75*4$