Calculate then write in the scientific notation 138x10^(-1) + 7, 8 x 10^(6) + 52 x10 ^(3)

Without multiplying, tell which product is larger and why. 5 × 1/3 or 5 × 2/3 a)5 × 1/3 because 1/3 is less than 2/3 b) 5 × 1/3 because 1/3 is greater than 2/3 c) 5 × 2/3 because 1/3 is less than 23 d) 5 × 23 because 1/3 is greater than 2/3

Which pair of numbers is relatively prime? a. 105 and 128 b. 130 and 273 c. 205 and 350 d. 273 and 333

Adele is five years older than timothy. in three years, timothy will be 2/3 of adele’s age. what is adele‘s current age?