Answer:
0.222222222
Step-by-step explanation:
in fractions, the / represents division.
so, we do:
2 ÷ 9 = 0.222222222
Hope this helps.
Answer: 12x² + 11x - 15
fg = (4x - 3)(3x + 5) = 12x² + 20x - 9x - 15 = 12x² + 11x - 15
Step-by-step explanation:
1 * 4 4
2----- 2-----
3 * 4 12
+ 3 * 3 + 9
1----- 1-----
4 * 3 12
------------------------
13
3 -----
12
welcome :/
Answer:
(A) T-stat = 1.82
(B) Critical value is 1.645
(C) Yes, there is sufficient evidence to reject the null hypothesis using a 0.05 significance level.
Step-by-step explanation:
(A) T-stat (z) = (sample mean - population mean) ÷ sd/√n
sample mean = 3850 bus miles
population mean = 3800 bus miles
sd = 275 bus miles
n = 100
z = (3850 - 3800) ÷ 275/√100 = 50 ÷ 275/10 = 50 ÷ 27.5 = 1.82
(B) The test is a one-tailed test. The critical value is obtained from the standard normal distribution table. The critical value using a 0.05 significance level is 1.645
(C) Null hypothesis: The bus mechanical reliability is 3850 bus miles.
Alternate hypothesis: The bus mechanical reliability is less than 3850 bus miles.
Conclusion:
There is sufficient evidence to reject the null hypothesis because the test statistic (1.82) is greater than the critical value (1.645)
Hello!
so we just need to raise the pool back to original level
in total, the pool drained a total of 1 and 3/8 inches
so we need to find out how long it would take to raise the pool by 1 and 3/8 inches
1 inch=320 gallons
1 and 3/8=320 times 1 and 3/8=320 and 960/8=440
he needs to put in 440 gallons
it is 5.75 gallons per minute
find out how many minutes it will take
440=5.75 times x minutes
divide both sides by 5.75
76.521=xminutes
round
77 minutes
1 hour=60 minutes
77>60
it will take more than 1 hour to make the pool back to original level
Hope this Helps! Have A Wonderful Day! :)