Me with these 2 math problems
1. jennifer works in a flower shop. on saturday she started work at 8: 45 am. she spent 3/4 hour at lunch. she finished at 4: 15 pm. how many hours did she work on saturday? answer choices: 6 hours, 6 1/2 hours , 6 3/4 hours
2. jacks height was 68 1/2 in june. he had grown 1 5/8 during the school year. how tall was he when school started ?
answer choices: 66 7/8 inches, 66 1/8 inches , 67 inches me with these 2 math problems

On the way home from visiting his family, vincent’s plane cruised at an altitude of 3.2 × 10^4 feet. he had heard that a man named felix baumgartner skydived from an altitude of 1.28 × 10^5 feet. vincent wants to know how much higher felix went on his skydiving trip. question 1 you have already seen how adding numbers works in either scientific notation or standard notation. but can you subtract numbers in scientific notation and get the same results as subtracting in standard notation? to find out, first solve vincent’s problem in standard notation. part a write the cruising altitude of vincent’s plane in standard notation.