with Correct Answers 100% Pass
Describe the result of adding a large positive number and a smaller negative number. -
✔✔The result is a smaller positive number, and is the same as ignoring the signs and
subtracting the smaller number from the larger.
How do you convert a fraction into a decimal? - ✔✔Divide the top number (Numerator)
by the bottom number (denominator).
What is the key step that must be performed in order to add or subtract unlike
fractions? - ✔✔You must find the lowest (Least) common denominator.
How do you divide one fraction by another? - ✔✔You invert the divisor and multiply
the numerators together and the denominators together.
How can you convert a decimal into a percent? - ✔✔(1) Multiply the decimal by 100 and
add the percent sign.
(2) Move the decimal point two places to the right and add the
percent sign.
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,How do you convert a fraction into a percent? - ✔✔Convert it to a decimal, move the
decimal point two places to the
right and add the percent sign
How do you change a decimal into the nearest equivalent fraction? - ✔✔Multiply the
decimal by the desired denominator. The result
becomes the numerator in the traction.
What are two different ways that a ratio may be expressed? - ✔✔(1) As a fraction.
(2) By placing a colon (s) between the two numbers.
(3) By using the word '10" between the two numbers
What is a proportion? - ✔✔—
A statement of equality between two or more ratios.
What is meant by the root of a number? - ✔✔A root is two or more equal smaller
numbers that, when multiplied
together, equal the specified number.
How do you find the square of a number? Give an example. - ✔✔Multiply the number
by itself Examples:
4 X 4 =16, 7 X 7 =49
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,What is a common method of making computations involving very large or very small
numbers more manageable? - ✔✔Convert the numbers into scientific notation by using
powers of 10.
How is 100.000 expressed as a power of 10? - ✔✔10^5 (10 to the 5'" power).
What formula is used to find the area of a
rectangle and of a triangle? - ✔✔For a rectangle,
A = L X W.
For a triangle,
A = 1/2(B X H).
Define Pi (π) - ✔✔Pi is a constant that expresses the relationship between the
gigozngterence of a circle and its diameter and is approximately equal to
Describe a trapezoid. - ✔✔A trapezoid is a closed, four-sided figure having two parallel
sides
and two sides that are not parallel.
What is the formula for computing the area of a circle? - ✔✔A=πr^2
Define matter. - ✔✔Any substance that occupies space and has mass.
Matter may exist in what three states? - ✔✔Solid, liquid, gas, (Plasma).
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, Define kinetic energy. - ✔✔Kinetic energy is the energy of motion,
Work is the product of what two factors? - ✔✔Force and the distance moved,
What are the parts of a lever? - ✔✔A rigid bar and a pivot point called the fulcrum.
A wheelbarrow is an example of what class of lever? - ✔✔A second-class lever.
Are all three states of matter affected by thermal expansion and if so, which state is
affected most? - ✔✔All three states are affected, with gases being affected the most.
What is a British Thermal Unit? - ✔✔The amount of heat energy required to change the
temperature of 1 pound of water 1 degree Fahrenheit.
Name the three methods of heat transfer? - ✔✔Conduction, convection and radiation.
What term defines the temperature at which all molecular motion ceases? - ✔✔Absolute
zero.
Can liquids be compressed? - ✔✔No, liquids are generally considered incompressihle.
What are the customary units used to express hydraulic or pneumatic pressure in the
United States? - ✔✔Pounds per square inch (PSI)
Describe how pressure is transmitted when a force is applied to a confined liquid. -
✔✔Pressure is transmitted equally in all directions,
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