Answer:
A= 30
Step-by-step explanation:
A= a+b over 2
h= 5+15 over 2 times that by 3 to get 30
Answer: The correct order
8mm, 41 cm, 790 dm, 788m, 537 km
Step-by-step explanation:
Answer:
(28 x 14) + (36 x 15)
Step-by-step explanation:
the x is multiplication
To calculate it use pythagoras: a^2+b^2=c^2
7^2+10^2=49+100=149
calculate the square root:

so the diagonal is about 12.2 inches long
Answer: 78.55inches
Step-by-step explanation: see attachment