Determine if the following statements are True or False about unit rates:
a. The ratio 83 to 21 has a unit rate of 163.
b. The ratio 9:61 has a unit rate of 54.
c. The ratio 52:41 has a unit rate of 58.
d. The ratio 521:121 has a unit rate of 332.
10. Which expressions can evaluate 418(27)?
(A) 418(20−7)
(B) (420−2)(27)
(C) (400−18)(27)
(D) (418)(20+7)
(E) (418)(30−3) 11. Does each expression equal negative seven times triple m minus eleven?
−7(m3−11)−7(3m)−7(−11)−21m−77−21m+77−21m−11−7m3+77 12. What is the simplified form of −8(2m+9k−13)?
(A) −16m+9k−13
(B) −16m−72k+104
(C) −16m−72k−104
(D) 16m−72k−104
Evaluate (1.28×105)+(1.13×103) in scientific notation. Then, (7.26×106)−(1.3×104). Lastly, find the mass of 480,000,000 bacteria if one bacterium has a mass of 2×10−12 gram.