Please Help Me Find the premiter of the semi circle l. Round to the nearest hundredth ( use Pi key)

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.

If you have 12 feet of string and you cut it into equal length of 5 inches each how much string will be left

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