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Algebra L1-4 Quiz v3

Last updated about 2 years ago

5 questions

1

1

1

2

Question 4

4.

The formula for calculating simple (non-compounded) interest is I=PRT, where I is the amount of interest, P is the "Principle" (the amount of money you earn or owe interest on), R is the rate of interest per time period, and T is the number of time periods.
A) Solve this formula for T, then

B) Find out how long a deposit has been earning interest if the amount of interest is $325, the rate of interest is 0.025 per month (often written as 2.5% per month), and the principle deposit was $2,000.00.

1

Question 1

1.

Solve the formula for the area of a triangle A=\frac{1}{2}bh for the length of the base, b.

b=\frac{1}{2Ah}

b=\frac{2A}{h}

b=\frac{h}{2A}

b=2Ah

Question 2

2.

Álmos claims he can run at a speed of at least 20 \frac{\textrm{km}}{\textrm{hr}} for over 10 minutes straight! To test this, his friends want to set up a start and finish line that he must run between in 10 minutes or less. What equation gives the distance they should set for the race?

d=20-\frac{1}{6}

d=\frac{1}{6}\div 20

d=20\div \frac{1}{6}

d=20\cdot \frac{1}{6}

Question 3

3.

We can write that two ratios are equivalent to each other using an equation, as in \frac{a}{b}=\frac{c}{d}. Which of the following equations is equivalent to that statement?

a\cdot d=b\cdot c

a+d=c+b

\frac{a}{c}=\frac{b}{d}

\frac{b}{a}=\frac{d}{c}

a\cdot c=b\cdot d

Question 5

5.

Sir Isaac Newton defined his own temperature scale wherein 0^\circ was the melting point of snow, and 33^\circ was definied to be the boiling point of water. We thus have the following conversion between degrees on the Newton scale^\circ N and degrees on the more modern Kelvin scale, ^\circ K .
Solve this formula for K .