Acertain microscope is able to magnify an object up to 100,000 times its original size. in scientific notation, 100,000 is 1 • 10-5 1 • 10-4 1 • 104 1 • 105

Money off coupons have been circulated to 300 households. only 2/5 of these were redeemed (used) in the local supermarket to get a free shampoo. what fraction of coupons were unused? (ps: write how you got the answer)

In an equilateral triangle, each angle is represented by 5y+3. what is the value of y? a. 9.7 b. 10.8 c. 11.4 d. 7.2

Can someone show me step by step how to do this?