Answer:
Step-by-step explanation:
Keep in mind that 1 week is equivalent to 168 hours, or, alternatively, to (7 days)(24 hours per day). Thus, Answer 5 is correct.
Answer:
28 square metres
Step-by-step explanation:
Calculate the total surface area of the glass covered part of the rectangular aquarium
Surface area = 2(4 × 2) + 2(3 × 2)
= 16 + 12
Protective film needed = 28 square metres
Answer:
24
Step-by-step explanation:
let Sammy's age be x and Lisa y
since Lisa is 4years older than Sammy
y=x+4
28-4=y
y=24
the y value is one ? just insert the 0 into the x which would make the 54 disappear and leave you with y=1
