Math and Arithmetic

Math is the study of abstractions. Math allows us to isolate one or a few features such as the number, shape or direction of some kind of object. Then we can study what can be learned about the behavior of those features while ignoring everything else about the object.

How many years is 46 months?

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3 years and 10 months

What is 20 degrees Celsius in Fahrenheit?

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20°C is equal to 68°F The conversion formula is °F = (9/5 °C)+ 32 ------------------------------- F = [20 * (9/5)] + 32 F = 36 + 32 F = 68. It's easy to convert from Celsius to Fahrenheit by yourself. Tf = (9/5)*Tc+32, where Tc = temperature in degrees Celsius, Tf = temperature in degrees Fahrenheit.20 C is 68 F. 20 degrees Celsius is 68 degrees Fahrenheit. Conversion from Celsius to Fahrenheit is done in three steps: 1. Multiply value in degrees Celsius by 9. 2. Divide result of step 1 by 5. 3. Add 32 to result of step 2. Conversion formula: [°F] = [°C] * 9 / 5 + 32 = 20 * 9 / 5 + 32 = 68 °F 68 F

How large is a volume needed to contain 21 grams of silver?

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Definition of density: Density = mass / volume; solving for density: volume = mass / density. Density of silver is about 10.5 grams/cm3.

How many different ways can you make 23 cents in change?

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Assuming you're American: 23¢ = 23 × 1¢ = 18 × 1¢ + 5¢ = 13 × 1¢ + 2 × 5¢ = 13 × 1¢ + 1 × 10¢ = 8 × 1¢ + 3 × 5¢ = 8 × 1¢ + 1 × 5¢ + 1 × 10¢ = 3 × 1¢ + 4 × 5¢ = 3 × 1¢ + 2 × 5¢ + 1 × 10¢ = 3 × 1¢ + 2 × 10¢ So there are 9 different ways. If you were European, there would also be a 2 cent coin and a 20 cent coin to consider in the mix.

Why is estimating Not as helpful when multiplying very small numbers such as 0.007 and 0.053?

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Estimating is not as helpful when multiplying very small numbers because the numbers aare very easy to answer

How many cups is 50 grams?

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That is 1/5 of a cup.

How would you measure the melting point of a solid that melts above 100 C?

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Electrically heated apparatus is used to measure the melting point of a solid that melts above 100 degrees Celsius. This apparatus can also be used for even higher melting points.

Find the probability of a 4 turning up at least once in two tosses of fair die?

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Pr(4 turns up at least once in two tosses) = 1 - Pr(4 turns up zero times in two tosses) = 1 - (5/6)*(5/6) = 1 - 25/36 = 11/36

When multiplying fractions do you multiply the denominator?

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When multiplying fractions you multiply the numerator to the numerator and the denominator to the denominator. For example: 2/3 x 4/5 = 2x4/3x5

How long will it take you to drive 86 miles drving at the speed of 65?

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For questions like this, it's is very helpful to look at units when you're doing your calculations. you're traveling at 65 miles/hour which also means that in 1 hour you travel 65 miles (1hour/65miles). So you have 1 hour / 65 miles * 86 miles = (1 hour * 86 miles ) / (65 miles) = 86/65 hours = 1.323 or approximately 80 minutes.

How many centimeter in 1 inch?

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1 inch = 2.54 centimeters 2.54 cm = 1 inch

How many times can 3 go into 48 and 84?

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3 can go into 48 16 times, and can go into 84 28 times. THIS IS VERY TRUE HAPPY VALENTINE'S DAY

How many grams of NO are required to produce 145g of N2 in the following reaction 4nh3 plus 6no 5n2 plus 6h20?

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4NH3 + 6NO -> 5N2 + 6H2O 145 g N2 x (1 mol/28.0 g) x (6 mol NO/5 mol N2) x (30.0 g NO/1 mol NO) = 186.4285714 g NO rounds to 186 g NO due to significant figures

What is bigger - a pint or a quart?

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One US quart is equal to two US pints each comprising 16 fluid ounces. One Imperial quart is equal to two Imperial pints each comprising 20 fluid ounces. In each standard of measurement: one quart is equal to one quarter of a gallon and 4 quarts equal one gallon. I learned this visual method in school. Draw a big "G" to represent gallons. Inside the "G" draw 4 "Q"s. "Q"=Quart. Inside each "Q" draw 2 "P"s. "P"=Pint. Inside each "P" draw 2 "C"s. "C" =Cup. So if you need to know which is bigger you now have a visual representation.

How many edges does a rectangular prism have?

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A rectangular prism (a cuboid) has 12 edges (also 6 faces and 8 vertices). A rectangular prism has 12 edges 12 12 edges A rectangular prism has eight (8) edges. It's a 688!