Question

Questions 1
The exam scores of all 500 students were recorded and it was determined that these scores were normally distributed. If Jane's score is 0.8 standard deviation above the mean, then how many, to the nearest unit, students scored above Jane?
A. 394
B. 250
C. 400
D. 106
Questions 2
If f(x) is an odd function, then | f(x) | is
A. an odd function
B. an even function
C. neither odd nor even
D. even and odd
Questions 3
The period of | sin (3x) | is
A. 2 π
B. 2 π / 3
C. π / 3
D. 3 π
Questions 4
When a metallic ball bearing is placed inside a cylindrical container, of radius 2 cm, the height of the water, inside the container, increases by 0.6 cm. The radius, to the nearest tenth of a centimeter, of the ball bearing is
A. 1 cm
B. 1.2 cm
C. 2 cm
D. 0.6 cm
Questions 5
The period of 2 sin x cos x is
A. 4 π 2
B. 2 π
C. 4 π
D. π
Questions 6
The probability that an electronic device produced by a company does not function properly is equal to 0.1. If 10 devices are bought, then the probability, to the nearest thousandth, that 7 devices function properly is
A. 0.057
B. 0.478
C. 0.001
D. 0

Answer 1

17d, 18b, 19c, 20b

21d, 22a.

Plz mark it as brainliest

Answer 2

17d, 18b, 19c, 20b

21d, 22a.