John wants to make 100 ml of a 5% alcohol solution by mixing a 2% alcohol solution with a 7% alcohol solution. How many milliliters of 7% solution must he use? 80ml of 7% solution 75ml of 7% solution 65ml of 7% solution 60ml of 7% solution 50ml of 7% solution

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Q: If you have a bottle with 5L of a solution in it and you remove quantities of 1L, 200ml, 50ml, and…

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Q: Lola bought 3 bushels of barley.she wants to pour all of the barley into containers that can hold…

A: Total quantity of Barley = 3 Bushels We know that 1 Bushel = 37.23 quarts. Therefore, total quantity…

Q: rubbing alcohol is typically diluted with water to 70% strength. If you need 3.5 oz of 45% rubbing…

A: Let x=amount of 70% rubbing alcohol needed Then 3.5-x=amount of water needed Now we know that the…

Q: What quantity of pure acid muc=st be added to 2 gal of 30% acid solution to product a 60% acid…

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Q: A recipe calls for 1 bunch of clean basil. Basil costs $1.89 per bunch. Each bunch weighs 5 ounces…

A: A recipe calls for 1 bunch of clean basil. Basil costs $1.49 per bunch. Each bunch wieght 5 ounces…

Q: Monica needs to mix a 10% acid solution with a 40% acid solution to create 100 milliliters of a 22%…

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Q: How much water must be evaporated from 7 qt of a 50% antifreeze solution to produce a 70% solution?

A: Quantity of antifreeze solutionSolution percentage

Q: One solution was 20% iodine and another was 60% iodine. How much of each should be used to get 360…

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Unitary Method

The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products. 

Speed, Time, and Distance

Imagine you and 3 of your friends are planning to go to the playground at 6 in the evening. Your house is one mile away from the playground and one of your friends named Jim must start at 5 pm to reach the playground by walk. The other two friends are 3 miles away.

Profit and Loss

The amount earned or lost on the sale of one or more items is referred to as the profit or loss on that item.

Units and Measurements

Measurements and comparisons are the foundation of science and engineering. We, therefore, need rules that tell us how things are measured and compared. For these measurements and comparisons, we perform certain experiments, and we will need the experiments to set up the devices.