Please help!

Question

1. A taxi cost $2.25 for the first mile plus .15 for each additional tenth of a mile. For a 5.2 mile trip Eric paid $10 and told the driver to keep the change. How much was the drivers tip?

2. 2 trillion is how much more than seven hundred fifty billion. Write the answer in scientific notation.

Thanks

Answer 1

1mile * $2.25= $2.25

Remaining miles are 4.2 which is 42 tenths of miles.

42*.15= $6.30
Total for ride is 6.30 + 2.25= $8.55

He paid $10, so 10-8.55=$ 1.45 which is the change or can be called the tip.

2trillion = 2,000,000,000,000
750 billion= 750,000,000,000

Subtract 2,000,000,000,000-750,000,000,000= 1,250,000,000,000

Scientific notation is 1.25* 10^12

Answer 2

Good to know im not the only one struggling with Saxon math. (I assume this is what those problems are from as they are in my book)