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Lera25 [3.4K]
1 year ago
7

mr. Chiang announced the grade distribution weeks book reports. Of the 20 students in class, 8 received A's for their book repor

ts,11 receive b's, and 5 receive C's. when is student is chosen at random to be the first one to read his or her book to report to the class, what is the probability that the student choose that has received an A for the book report?
Mathematics
1 answer:
vampirchik [111]1 year ago
3 0

Answer:

yes

Step-by-step explanation:

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Triangle ABC is an obtuse triangle with the obtuse angle at the vertex B angle A must be?
alekssr [168]

Acute. No triangle can have more than 1 obtuse angle.

7 0
1 year ago
Read 2 more answers
Kristin owns a bakery called Kristin's Cakes n' Such and is considering lowering the price of her cakes. Kristin polls her custo
azamat
The total revenue that is gained from the sales of the cakes is determined by multiplying the number of cakes by the price. If we let x be the number of $1 that should be deducted from the price and y be the total revenue,
                               y = (25 - x)(100 + 5x)
Simplifying, 
                              y = 2500 + 25x - 5x²
We get the value of x that will give us the maximum revenue by differentiating the equation and equating the differential to zero.
                             dy/dx = 0 = 25 - 10x
The value of x is 2.5. 
 The price of the cake should be 25 - 2.5 = 22.5. 
Thus, the price of the cake that will give the maximum potential revenue is $22.5. 
7 0
2 years ago
Theresa has hired Chuck and Diana to paint a fence. Diana can paint 150 fence posts in the same time it takes Chuck to paint 130
Alenkasestr [34]

Answer: Chuck can paint 65 posts per hour.

Step-by-step explanation:

The data we have here is:

Diana can paint 150 fence posts in a time T

Chuck can pint 130 fence posts in a time T.

In one hour, Diana can paint 10 more fence posts than Chuck.

If D is the hourly rate of Daian, and C is the hourly rate for Chuck, we have:

D = 150/T

C = 130/T

D = C + 10

we can replace the last equation in the first one and geT:

C + 10 =150/T

C = 130/T

Now we can replace the bottom equation in the above one:

130/T + 10 = 150/T

10 = 150/T - 130/T =  20/T

T*10 = 20

T = 20/10 = 2

So T is 2 hours, then whe have:

D = 150post/2hours = 75 posts per hour.

C = 130 posts/2hours = 65 posts per hour.

4 0
1 year ago
Mackin Investing charges its customers a 1% commission. The Ross Group, a discount broker, charges $25 per trade. For what amoun
olchik [2.2K]

Answer:

The amount of stock for which both brokers would charge the same commission is $2500.

Step-by-step explanation:

i) Let the amount of stock to be traded be worth $x

ii) therefore for both the brokers to charge the same commission we can write

   1% of x  = $25 \RIghtarrow\Rightarrow  0.01 \times x  = 25  \therefore   x = \frac{25}{0.01}  = 2500

The amount of stock for which both brokers would charge the same commission is $2500.

5 0
1 year ago
Perform the following computations. retail price of steel-belted radial tire = $89.50 discount offered = 10% federal tax = 12% l
RUDIKE [14]
For the answer to the question above
Retail price of steel-belted radial tire = $89.50 
Discount offered = 10% = $8.95 
Value before federal tax = $89.50 - $8.95 = $80.55 
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Selling price = $80.55 +$9.67+$4.03 =$94.25
I hope my answer helped you. Feel free to ask more questions. Have a nice day!
4 0
2 years ago
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