Answer:
Might be
Step-by-step explanation:
A.) The probability of all dependent events can be calculated using the OR formula
Original equation
<span>√x+10-9 = -7
</span>Isolate
<span>√x+10 = 9-7
</span>
<span>√x+10 = 2
</span> Raise both sides to the second power
<span> (√x+10)2 = (2)2
</span> After squaring
<span> x+10 = 4
</span>
x + 6 = 0
so the answer is x=-6
<span>
</span>
I'm guessing that the 2 in that is ^2? if so, it opens down.
A=2πrh+2πr2=2·π·6·25+2·π·6^2 so the answer is D
Surface area= 2(6x15)+2(7x15)+2(6x7)
=180+210+84
=474m
Volume=15x6x7
=630m^2
