Can some one help me with these 2 answers?

√78 is equal to 8.8, so it rounded up it would be placed on the nine on the number line.

-√15 is equal to -3.8 so I would put it at the 3 marker.

$53.50

step-by-step explanation:

you have to subtract the amount of money chuck earned ($72.50) by the cost of the gas for the mower ($11.25) and the new string for the trimmer he bought ($7.75).

72.50-11.25=61.25

and then subtract $61.25 by the second thing he bought (the new string for the trimmer)

61.25-7.75=53.5

so in total it's $53.50 (53 dollars and 50 cents)

13664

step-by-step explanation:

=cross multiply

=100 x = 13664