Which number is between 7.17 x 10^4 and 8.17 x 10^5

Tanya has $42 to spend at the dolphin island store. tshirts sell for $7 each and a pair of sunglases sells for $6.tanya buys 3 tshirts. how many pairs of sunglases can she buys with the amount of money she has left

This summer the number of tourists in salem increased 4.5% from last years total of 426000. how many more tourists came to salem this summer

Measure a and b and find their sum. how are the angles related?