In a certain chemical, the ratio of zinc to copper is 3 to 19. A jar of the chemical contains 760 grams of copper. How many grams of zinc does it contain?

760-19

x-3

x=760*3=2280

2280/19=120g of zinc

Step-by-step explanation:

b) 1/3 * 1/5

step-by-step explanation:

each smallest part is 1/15 since the written one is 1/5 and it's divided by 3 equal parts. (1/5 )/3 = 1/15 = 1/3 * 1/5

v = 1/3 a^2h

step-by-step explanation:

the volume is 1/3 a^2h.