I can help with number 4 we are learning this in my class to (5th grade) Its tough
Volume of sphere = 4/3 x pi x r^3
904.32 = 4/3 x pi x r^3
Divide both sides by 4/3
678.4 = pi x r^3
Divide both sides by pi:
216 = r^3
Take the cubic root of both sides
R = 6
Answer: 0.0546875
Step-by-step explanation:
The number of times the coin landing head 8 out of 10 is simply:
C(10, 8)/2^10. At least 8 means, 8 or more. Since the events here are dependent on themselves the answer would be:
[ C(10, 8) + C(10, 9) + C(10, 10) ] / 2^10 = 56/1024 = 0.0546875
Equivalents fractions for 7/4:
7/4, 14/8, 21/12, 28/16, 35/20, 42/24, 49/28, 56/32, 63/36, 70/40, and so on ...
Example:
7/4 * 2/2 = 14/8
7/4 * 3/3 = 21/12
7/4 * 4/4 = 28/16
7/4 * 5/5 = 35/20
7/4 * 6/6 = 42/24 and so on.......
Answer:the first option
Step-by-step explanation:
