correct answers
Describe the result of adding a large positive number and a smaller negative
number. - 🔷ANSWERS 🖊✔✔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? - 🔷ANSWERS 🖊✔✔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? - 🔷ANSWERS 🖊✔✔You must find the lowest (Least) common
denominator.
How do you divide one fraction by another? - 🔷ANSWERS 🖊✔✔You invert the
divisor and multiply the numerators together and the denominators together.
How can you convert a decimal into a percent? - 🔷ANSWERS 🖊✔✔(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.
How do you convert a fraction into a percent? - 🔷ANSWERS 🖊✔✔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? - 🔷ANSWERS 🖊
✔✔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? - 🔷ANSWERS 🖊✔✔(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? - 🔷ANSWERS 🖊✔✔—
A statement of equality between two or more ratios.
What is meant by the root of a number? - 🔷ANSWERS 🖊✔✔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. - 🔷ANSWERS 🖊
✔✔Multiply the number by itself Examples:
4 X 4 =16, 7 X 7 =49
What is a common method of making computations involving very large or very
small numbers more manageable? - 🔷ANSWERS 🖊✔✔Convert the numbers into
scientific notation by using powers of 10.
How is 100.000 expressed as a power of 10? - 🔷ANSWERS 🖊✔✔10^5 (10 to the
5'" power).
What formula is used to find the area of a
rectangle and of a triangle? - 🔷ANSWERS 🖊✔✔For a rectangle,
A = L X W.
For a triangle,
A = 1/2(B X H).
Define Pi (π) - 🔷ANSWERS 🖊✔✔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. - 🔷ANSWERS 🖊✔✔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? - 🔷ANSWERS 🖊✔✔A=πr^2
Define matter. - 🔷ANSWERS 🖊✔✔Any substance that occupies space and has
mass.
Matter may exist in what three states? - 🔷ANSWERS 🖊✔✔Solid, liquid, gas,
(Plasma).
Define kinetic energy. - 🔷ANSWERS 🖊✔✔Kinetic energy is the energy of motion,
Work is the product of what two factors? - 🔷ANSWERS 🖊✔✔Force and the distance
moved,
What are the parts of a lever? - 🔷ANSWERS 🖊✔✔A rigid bar and a pivot point
called the fulcrum.
A wheelbarrow is an example of what class of lever? - 🔷ANSWERS 🖊✔✔A second-
class lever.
Are all three states of matter affected by thermal expansion and if so, which state is
affected most? - 🔷ANSWERS 🖊✔✔All three states are affected, with gases being
affected the most.
What is a British Thermal Unit? - 🔷ANSWERS 🖊✔✔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? - 🔷ANSWERS 🖊✔✔Conduction,
convection and radiation.