Question

Both questions are in the photo but if u only feel like answering 1 that’s ok but both would be great

Answer 1

1.

5.6 x 10⁴ = 56000

7.8 x 10⁵ = 780000

56000 + 780000 = 836000 or 8.36 x 10⁵

2.

Erica scored 87% while Alex scored 76% on her/his last test. How do we know this? Well, we must convert the fraction into a decmial first.

The fraction is 19/25

We have to do 19 divided by 25 and we'll get 0.76

Then do 0.76 x 100 and you'll get 76

76 = 76%

Therefore the precentage grade is a 11% difference.