Answer:
6.1 m
Step-by-step explanation:
Always draw a diagram! And now pythagorean theorem. a^2 + b^2 = c^2
Substitution:
a^2 + 2.8^2 = 6.7^2
a^2 + 7.84 = 44.89
a^2 = 37.05
a = 6.086...
Rounding <u>up</u> to one decimal point, thats 6.1 m
1.-28×-28×-28+13×13×13+16×16×16
=21,952+2,197+4,096
=28,245.
2.12×12×12+-7×-7×-7+-5×-5×-5
=1,728+-343+-125
=1,260
