Write 7x10x10x10x10 with an exponent

Your client has saved $1,860 for a down payment on a house. a government loan program requires a down payment equal to 3% of the loan amount. what is the largest loan amount that your client could receive with this program

Bob the builder is making 480kg of cement mix. this is made by cement, sand and gravel in the ratio 1: 3: 4

The candy store is having a 30% off sale. emma is going to buy $7.50 worth of candy.how much will she pay after the discount