90°
∠AEF is a right angle
∠CEF is a straight angle
m∠CEF = m∠CEA + m∠BEF
4900=4200(1+r/2)^(2*4)
Solve for r
R=(4900/4200)^(1/8))-1)*2
R=((4,900÷4,200)^(1÷8)−1)×2
R=0.039*100=3.9%
Answer:

Step-by-step explanation:
If you divide
by 4 (both numerator and denominator)
You get
which is equivalent to the given ration
Answer:
34
Step-by-step explanation:
52-35 = 17
$17 divided by $0.50 = 34 texst messages