By graphing the given options as shown in attached figure
<span>f(x) = (1/4)^x+2 ⇒⇒⇒⇒ The black graph
f(x) = (1/4)^x +2 </span><span>⇒⇒⇒⇒ The red graph
</span>
f(x) = (1/4)^x-2 <span><span>⇒⇒⇒⇒ The blue graph
</span></span><span><span />
f(x) = (1/4)^x -2 ⇒⇒⇒⇒ The green graph
</span>
The correct answer will be the blue graph
Lets write this out:-
2.4 + 0.8 = ________ + 1.21 = ______ + 1.78 = ______ - 5.14 = _____
So to solve d blanks we will do d following:-
2.4 + 0.8 = 3.2
Now lets write this out AGAIN.
2.4 + 0.8 = 3.2 + 1.21 = ______ + 1.78 = ______ - 5.14 = ____
Now lets solve again:-
3.2 + 1.21 = 4.41
Now lets write this out AGAIN.
2.4 + 0.8 = 3.2 + 1.21 = 4.41 + 1.78 = ______ - 5.14 = ____
Now lets solve again:-
4.41 + 1.78 = 6.19
Now lets write this out AGAIN.
2.4 + 0.8 = 3.2 + 1.21 = 4.41 + 1.78 = 6.19 - 5.14 = ____
Now lets solve again:-
6.19 - 5.14 = 1.05
Now lets write this out AGAIN.
2.4 + 0.8 = 3.2 + 1.21 = 4.41 + 1.78 = 6.19 - 5.14 = 1.05
So, 2.4 + 0.8 = 3.2 + 1.21 = 4.41 + 1.78 = 6.19 - 5.14 = 1.05
Hope I helped ya!! xD
5.21 would just be 5 or 5.2 depending on what place you need to round.