Find the solution(s) of the following equation. b^2 = 49b
2
=49b, squared, equals, 49
Choose all answers that apply:
Choose all answers that apply:

(Choice A)
A
b = 7b=7b, equals, 7

(Choice B)
B
b = -7b=−7b, equals, minus, 7

(Choice C)
C
b = \sqrt{49}b=
49
​
b, equals, square root of, 49, end square root

(Choice D)
D
b = -\sqrt{49}b=−
49
​
b, equals, minus, square root of, 49, end square root

(Choice E)
E
None of the above

At wind speeds above 1000 centimeters per second (cm/sec), significant sand-moving events begin to occur. wind speeds below 1000 cm/sec deposit sand and wind speeds above 1000 cm/sec move sand to new locations. the cyclic nature of wind and moving sand determines the shape and location of large dunes. at a test site, the prevailing direction of the wind did not change noticeably. however, the velocity did change. fifty-nine wind speed readings gave an average velocity of x = 1075 cm/sec. based on long-term experience, σ can be assumed to be 245 cm/sec. (a) find a 95% confidence interval for the population mean wind speed at this site. (round your answers to the nearest whole number.) lower limit cm/sec upper limit cm/sec