Estimating Sums of Single Digit Numbers
Which of the following represents the most accurate estimation of 4 + 8? is the answer 5, 10, 20 or 25
Step-by-step explanation:
T = k * sqrt(d), where k is a real constant.
When d = 6, T = 5.
k = T / sqrt(d) = 5 / sqrt6.
Therefore when d = 3, T = (5 / sqrt6) * sqrt3 = 3.53.
A. Product of a constant factor 12 and two-term factor x+3
In quadrant I, when sin angle is 1/2, cos angle is (sqrt3)/2