20. How would I add this together, explain 27.4 + 213.321 + 39.38 36. 45.6 Subract, Explain -8.75 48. Add thirty-eight and nine tenths, five, and fifty-eight hundredths, seven, and fifteen and eight tenths. 58. Geometry. Find the perimeter of the figure given……. 10.5 ft, 6.3 ft, 3.2 ft, 7.4 ft, 5.8 ft 72. Alem’s restaurant bill. Estimate his total by rounding to the nearest dollar. $18.25, $8.75, $6.80, $7.40, $1.70 32. Business and finance. Claudia earns $6.40 per hour (h). For overtime (each hour over 40 h) she earns $9.60. If she works 48.5 h in a week, what pay should she receive? 68. Business and finance. To find the simple interest on a loan for 1 year at 12.5%, multiply the amount of the loan by 0.125. What simple interest will you pay on a loan of $1,458 at 12.5% for 1 year? I have already done this Work I got these ones wrong and need help understanding them For the final in 6 weeks, Its an online class and I have spent time on the phone with the teacher but still need to understand these problems. Thanks for being Helpful and understanding:(