Front

What is simple interest?

Back

Simple interest is calculated using the formula: I = PRT, where I is the interest, P is the principal amount (initial loan), R is the rate of interest per year, and T is the time in years.

Front

How do you calculate the total interest paid on a loan?

Back

Total interest can be calculated using the formula: Total Interest = Principal × Rate × Time.

Front

If a loan has a 5% interest rate and the total interest paid is $2,375, how do you find the principal?

Back

Rearrange the simple interest formula: Principal = Total Interest / (Rate × Time). For this case: Principal = 2375 / (0.05 × 5) = $9,500.

Front

What is the average cost of gasoline if it decreases by $0.94 and then $0.27, and increases by $0.36?

Back

Start with the initial cost ($3.34), subtract $0.94, then $0.27, and finally add $0.36. The final average cost is $2.49.

Front

How do you find the total distance traveled if you know the rate and time?

Back

Distance = Rate × Time. If Ariele hikes down 55 feet in 2.75 minutes, find the rate per minute and multiply by the total time.

Front

What is the relationship between percentages and fractions?

Back

Percentages can be converted to fractions by dividing by 100. For example, 65% = 65/100 = 13/20.

Front

How do you calculate the number of students who like sports from a percentage?

Back

Multiply the total number of students by the percentage (in decimal form). For example, for 80 classmates and 65%, it's 80 × 0.65 = 52 students.

Front

What is the difference between two groups when comparing percentages?

Back

To find the difference, calculate the number of individuals in each group who meet the criteria and subtract the smaller from the larger.

Front

What is a repeating decimal?

Back

A repeating decimal is a decimal fraction that eventually repeats a digit or group of digits indefinitely, such as 0.666... or 0.7 (repeating).

Front

How do you convert a fraction to a decimal?

Back

Divide the numerator by the denominator. For example, 7/9 = 0.777... (repeating).