3 years ago

Twenty students in class A and 20 students in class B were asked how many hours they took to prepare for an exam.

1 answer:

6 0

The mean study time is less for class b then class a

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dybincka [34]

Answer:

The answer is $61.20

Step-by-step explanation:

First you multiply 72 by .15 (which is 15% converted to a decimal), which gives you 10.8. You then subtract 10.8 from 72.

4 0

3 years ago

aliina [53]

Answer:

B. $108 \: {in}^{2}$

Step-by-step explanation:

Total surface area of the square pyramid

= 4 times the area of one triangle + Area of square

$= 4 \times \frac{1}{2} \times 6 \times 6 + {6}^{2} \\ \\ = 72 + 36 \\ \\ = 108 \: {in}^{2}$

3 0

3 years ago

Naddika [18.5K]

1. Balance after 1 year with simple interest= 600 + (2.5 x 12) = 600 + 30 = $630

2. Balance after 1 year with compounded interest = P ( 1 + $\frac{r}{n}$ $)^{nt}$

= 600 ( 1 + $\frac{0.05}{12}$ $)^{12}$ = 600 (1.0511) = $630.66 = approx. $630

6 0

3 years ago

Svet_ta [14]

The dot product of the two vectors will be given as follows:
v*w=(-7i+4j)*(-6i+5j)
=(-7*(-6))i+(4*5)j
=-42i+20j

Hence the answer is:
v*w=(-42i+20j)

8 0

3 years ago

GarryVolchara [31]

Answer:

5. 57 9. 63

Step-by-step explanation:

Im Smart

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2 years ago