Heather bought enough shells to make x necklaces. each necklaces holds 16 shells. heather has made 10 necklaces. is 16x + 10 a reasonable way to represent the number of shells that heather has left to make necklaces with? explain your answer.

Tiffany drives 285,120 feet before lunch and 628,320 feet after lunch. about how many kilometers does she drive all together

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.

I6.8.4 test lucas took out a car loan for $14,475 that has a 0% apr for the first 16 months and will be paid off with monthly payments over 5 years. for how many months will lucas be charged interest?