The problem states that (3)/(4) of the money is 36000 frs.

Here are the solutions to the problems: 16. Step 1: Let M be the total amount of money. The problem states that (3)/(4) of the money is 36000 frs. So, we can write the equation: (3)/(4) M = 36000 Step 2: Solve for M. Multiply both sides by (4)/(3): M = 36000 × (4)/(3) M = (36000 × 4)/(3) M = 12000 × 4 M = 48000 All of the money is worth 48000 frs. 17. Step 1: Identify the number to be rounded. The number is 3.256. Step 2: Round to 3 significant figures. The first three significant figures are 3, 2, and 5. The digit after the third significant figure (5) is 6. Since 6 5, we round up the third significant figure. So, 5 becomes 6. The number 3.256 correct to 3 significant figures is 3.26. 18. Step 1: Calculate the value of each term. 8^2 = 8 × 8 = 64 3^2 = 3 × 3 = 9 2^2 = 2 × 2 = 4 Step 2: Perform the subtraction. 8^2 - 3^2 - 2^2 = 64 - 9 - 4 = 55 - 4 = 51 The value is 51. 19. Step 1: Identify the principal amount (P), rate (R), and time (T). Principal (P) = 72000 frs Rate (R) = 8\% per annum = 0.08 Time (T) = 2 years Step 2: Use the simple interest formula: I = P × R × T. I = 72000 × 0.08 × 2 I = 72000 × 0.16 I = 11520 The simple interest is 11520 frs. 20. Step 1: Identify the diameter (d). Diameter (d) = 14 cm Step 2: Use the formula for the circumference of a circle: C = d. Using ≈ (22)/(7): C = (22)/(7) × 14 C = 22 × 2 C = 44 The circumference is 44 cm. 21. Step 1: Write the decimal as a fraction. 0.075 = (75)/(1000) Step 2: Simplify the fraction to its lowest terms. Divide both the numerator and the denominator by their greatest common divisor. Both 75 and 1000 are divisible by 25. 75 ÷ 25 = 3 1000 ÷ 25 = 40 So, the fraction in its lowest terms is (3)/(40). 0.075 as a fraction in its lowest term is (3)/(40). 22. Step 1: Calculate the value of each term. 8^2 = 8 × 8 = 64 3^2 = 3 × 3 = 9 Step 2: Multiply the results. 8^2 × 3^2 = 64 × 9 = 576 The value is 576. 23. Step 1: Identify the average and the number of values. Average of 3 numbers = 45 Number of values = 3 Step 2: Use the formula: Sum = Average × Number of values. Sum = 45 × 3 Sum = 135 The sum of the three numbers is 135. 24. Step 1: Identify the total volume and total price. Total volume of kerosene = 20 liters Total price = 700 frs Step 2: Calculate the price per liter. Price per liter = Total priceTotal volume = 700 frs20 liters = 35 frs/liter The price per liter was 35 frs. 25. Step 1: Calculate the total fraction of salary spent. Spent on food = (3)/(5) Spent on rent = (1)/(10) Total spent = (3)/(5) + (1)/(10) To add these fractions, find a common denominator, which is 10. (3)/(5) = (3 × 2)/(5 × 2) = (6)/(10) Total spent = (6)/(10) + (1)/(10) = (7)/(10) Step 2: Calculate the fraction left for other things. The whole salary is represented by 1. Fraction left = 1 - Total spent = 1 - (7)/(10) = (10)/(10) - (7)/(10) = (3)/(10) The fraction left for other things is (3)/(10). 26. Step 1: Identify the number. The number is 72,295. Step 2: Write the number in words. The number is Seventy-two thousand, two hundred ninety-five. In words, 72,295 is Seventy-two thousand, two hundred ninety-five. 27. Step 1: Identify the number. The number is 2.503. Step 2: Determine the place value of 5. In the number 2.503: 2 is in the units place. 5 is in the tenths place. 0 is in the hundredths place. 3 is in the thousandths place. The value of 5 in the number is 5 tenths or 0.5. 28. Step 1: Identify the given values for the rectangular lawn. Perimeter (P) = 24 m Length (L) = 4 m Step 2: Use the formula for the perimeter of a rectangle: P = 2(L + W), where W is the width. 24 = 2(4 + W) Step 3: Solve for W. Divide both sides by 2: (24)/(2) = 4 + W 12 = 4 + W Subtract 4 from both sides: W = 12 - 4 W = 8 The width of the lawn is 8 m. 29. Step 1: Add the numbers in base 10. 23 + 42 = 65 Step 2: Convert the sum (65 in base 10) to base 5. Divide 65 by 5 repeatedly and record the remainders. 65 ÷ 5 = 13 remainder 0 13 ÷ 5 = 2 remainder 3 2 ÷ 5 = 0 remainder 2 Read the remainders from bottom to top: 230_5. So, 23 + 42 in base 5 is 230_5. 30. Step 1: Identify Peter's birth year and the age he will be. Birth year = 1982 Age = 37 years Step 2: Add the age to the birth year to find the target year. Year = 1982 + 37 Year = 2019 Peter will be 37 years old in the year 2019. That's 2 down. 3 left today — send the next one.