could someone help explain these please?

Marl borrowed $200 at 12% simple interest for one year. If he makes no payments that year, how much interest will he owe at the end of the year?A $6.00B $12.00C $22.40D $24.00CSM02311

Tamika works in a shoe store and is paid a 12% commission on her sales. In January her sales total was $3740. To the nearest dollar, how much did Tamika earn in commission for January?A $312B $449C $3291D $4189

Stuart is buying a pair of jeans that regularly cost $40. They are on sale for 20% off. If the tax rate is 8%, what is the sale price of the jeans including tax? A $21.60 B $34.56 C $42.34 D $44.16

A calculator that is regularly priced $20 is on sale for 40% off. What is the sale price of the calculator? A $8 B $12 C $15 D $16

The percentage discount at a store is determined using the table below. Sale Discounts Total Purchases Discount less than $50 25% $50 to $100 30% over $100 35% Shamika bought 3 skirts that cost $25 each before the discount. What was her total after the discount? A B C D $45.00 $48.75 $52.50 $56.25

Mr. and Mrs. Blank sold their house for $200,000 and needed to hire an attorney to handle the closing procedures. Attorney Mr. Gable charges a flat rate of $2500. Attorney Ms. Mandel 1 charges 1 % of the cost of the house. Which 2 attorney would be cheaper for Mr. and Mrs. Blank to use? A Mr. Gable B Ms. Mandel C Their fees would be the same. D cannot be determined from the information given

you dont have to answer them if you dont want to, this isnt my homework im trying to study for a test so please help. just help!! please and thank you =] all help would be really appreciated

ya just explain to me step by step!! thanks. if you want tto give me the answer that would be fine too, but please explain it!! 9 minutes ago