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Anestetic [448]
1 year ago
10

I need to get the right for my grade so please help me

Mathematics
1 answer:
n200080 [17]1 year ago
8 0
The answer to your question would have to be 3060
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A particular professor is known for his arbitrary grading policies. eachpaper receives a grade from the set{a, a-, b+, b, b-, c+
zepelin [54]

Answer:

The answer to the question is;

The number of papers expected to be handed in before receiving each possible grade at least once is 14.93.

Step-by-step explanation:

To solve the question , we note that it is a geometric distribution question which have equal probabilities and therefore is a form of Binomial distribution with Bernoulli trials, where we are conducting the trials till we have r successes

Since we have r = 6, we will have to find the expected value of the number of trials till the nth paper handed in receives a previously awarded grade.

We therefore have,

The Probability that out of six papers turned 5 are different scores is given by

P(Y=5) = p'= q⁵p = (1-p)⁵p = 3125/46656

Therefore p' = the probability of receiving different grades once then the expected value is given by

E(X)  = 1/p' = 46656/3125 = 14.93.

3 0
3 years ago
Jake earned $400 over the summer. He earned $220 mowing lawns, and he earned the rest washing cars for $10 each. He used this eq
vlada-n [284]
He washed 18 cars this summer
8 0
2 years ago
Suppose sin a = 12/13 and sin b= 5/11. FInd cos(a+b)
m_a_m_a [10]

Answer:

1.28 or 912/715

Step-by-step explanation:

sine= opposite side/hypotenuse

cos=adjacent/ hypotenuse

sine a= 12/13 using the Pythagorean Theorem and solve for the missing side. (which is the adjacent side)

cos a = 5/13

Do the same for sine b

cos b= 9.8/11

add both the cosine value

(5/13)+(9.8/11)=1.28 or 912/715 in fraction form

6 0
2 years ago
The table shows the height of a soccer ball that has been kicked from the ground over time. (For reference: h(t) = 144 – 16t2) T
natta225 [31]
The answer is:

The rate of change is not constant and increases then decreases over time. The height of the ball above ground gets larger until 1.25 seconds and then gets smaller after that time.


Here's how:

The rate of change of the function is defined and calculated as (refer to the statement beloew):

r = [change in height] / {change in time]


For the Table:

refer to the attached picture.

The table shows the calculations for the rate of change (r) for each interval given.


And for the Conclusion,

Refer to the table and notice that in the third ans fifth columns show that:

The rate of change is not constant and increases then decreases over time. The height of the ball above ground gets larger until 1.25 seconds and then gets smaller after that time.


6 0
3 years ago
Suppose y varies directly with x. Write a direct variation equation to relate x and y if y = 10 when x = 2
Ksivusya [100]

Answer:

y=5x and y=40 when x=8

4 0
2 years ago
Read 2 more answers
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