Describe the error in the work shown. A small submarine starts at –1,260 feet in relation to sea level. Then it descends 5 feet per minute for 12 minutes. What is the new position of the submarine in relation to sea level?

It Has To be right

–1,260 + (–5)(12)= –1,260 + 60

= –1,200

The error is that instead of subtracting 60 feet from -1260, the expression adds this quantity.

Step-by-step explanation:

If starting at -1260 feet, and then going down (descending) 60 feet (result of descending 5 feet every minute for 12 minutes), the correct operation is:

-1260 + (-5)(12)= -1260-60= -1320

x =-.20752

step-by-step explanation:

4^(x+2)=12

4^(x+2)=12

take the log base 4 on each side

log 4 (4^(x+2) = log 4(12)

we know log b(a^y) = y log b (a)

(x+2) log 4(4) = log 4 (12)

x+2 = log 4 (12)

we know   logb c = loga c/loga b

we want to convert to base 10   so a = 10

by default, we do not write the 10   c = 4   and b = 10

log4 10 = log 12/log 4

log4 10 = log 12/ log 4

x+2 = log 12/ log 4

subtract 2 from each side

x +2 -2 = log 12/ log 4 -2

x = 1.79248125 -2

x =-.20752