Answer:
48 minutes.
Step-by-step explanation:
Number of dishes rinsed by Juan in <em>1</em><em> </em><em>m</em><em>i</em><em>n</em><em>u</em><em>t</em><em>e</em><em> </em>
= 480/80
= 6
Number of dishes rinsed by Kevin in <em>1</em><em> </em><em>m</em><em>i</em><em>n</em><em>u</em><em>t</em><em>e</em>
= 480/120
= 4
Number of dishes rinsed by Juan and Kevin in <em>1</em><em> </em><em>m</em><em>i</em><em>n</em><em>u</em><em>t</em><em>e</em>
= 6 + 4
= 10
Hence, time taken by Juan and Kevin to rinse the dishes
= 480/10
= <u>4</u><u>8</u><u> </u><u>m</u><u>i</u><u>n</u><u>u</u><u>t</u><u>e</u><u>s</u>.
Hence It will take <u>4</u><u>8</u><u> </u><u>m</u><u>i</u><u>n</u><u>u</u><u>t</u><u>e</u><u>s</u> for them to rinse the dishes.
Answer:
There is evidence to claim that the proportion of drug and alcohol use is higher locally than nationally.
Step-by-step explanation:
Given that a recent drug survey showed an increase in the use of drugs and alcohol among local high school seniors as compared to the national percent.
Let p1 be the proportion of local seniors and p2 national seniors.
(right tailed test at 5% significance level)
Group I II
Success 69 60 129
Total 100 100 200
p 0.69 0.6 0.645
q 0.31 0.4 0.355
se 0.046249324 0.048989795 0.033836002
p diff 0.09
Std error 0.03384
Z 2.659574468 0
p 0.00391
we find that p value is 0.00391 <0.05
Hence we reject null hypothesis
There is evidence to claim that the proportion of drug and alcohol use is higher locally than nationally.
Answer: A
Step-by-step explanation:
The total area would have to be 1, so (1/2)(5)(height)=1
2.5height = 1
height = 1/2.5 = 2/10 = 1/5
Answer: 9
Step-by-step explanation:
11 2/4 - 2 1/2
46/4 - 5/2
23/2 - 5/2
=18/2= 9
First, distribute 2 to all terms within the parenthesis
2(4x + 5) = 8x + 10
8x + 10 > 7x + 20
Isolate the x. Treat the > like a equal sign. Subtract 7x and 10 from both sides
8x (-7x) + 10 (-10) > 7x (-7x) + 20 (-10)
Simplify
8x - 7x > 20 - 10
x > 10
x > 10 is your answer
hope this helps
