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babymother [125]
3 years ago
13

A student earned grades of C,A,B, and A. Those courses had these corresponding credit hours: 4,6,1, and 6. The grading system as

signs quality points to letter grades as follows: A=4, B=3, C=2, D=1, and F=0. Compute the grade point average (GPA) and round the result to two decimal places.
Mathematics
1 answer:
lyudmila [28]3 years ago
7 0
First 4 credit class earns a C is worth:
4(2)= 8
second 6 credit class earns a A is worth:
6(4) = 24
third 1 credit class earns a B is worth:
1(3) = 3
fourth 6 credit class earns a A is worth:
6(4) = 24

add up the total points
8+24+3+24=59
add up total credits
4+6+1+6=17

divide total points by total credits
59/17 = 3.47 GPA
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Three friends got jobs at stores in the mall. Nina earns $117.60 for hours 14 of work. Ty earns for $148.50 hours 18 of work. Ki
marysya [2.9K]

Answer:

Kim has the highest pay rate in dollars per hour

Step-by-step explanation:

we know that

To find out the unit pay rate divide the total earning by the total time

so

Nina earns $117.60 for hours 14 of work

\frac{117.60}{14}=\$8.4\ per\ hour

Ty earns for $148.50 hours 18 of work

\frac{148.50}{18}=\$8.25\ per\ hour

Kim earns for $137.60 hours 16 of work

\frac{137.60}{16}=\$8.60\ per\ hour

8.6 > 8.4 > 8.25

therefore

Kim has the highest pay rate in dollars per hour

6 0
3 years ago
At what point does she lose contact with the snowball and fly off at a tangent? That is
postnew [5]

Answer:

α ≥ 48.2°

Step-by-step explanation:

The complete question is given as follows:

" A skier starts at the top of a very large frictionless snowball, with a very small initial speed, and skis straight  down the side. At what point does she lose contact with the snowball and fly off at a tangent? That is, at the  instant she loses contact with the snowball, what angle α does a radial line from the center of the snowball to  the skier make with the vertical?"

- The figure is also attached.

Solution:

- The skier has a mass (m) and the snowball’s radius (r).

- Choose the center of the snowball to be the zero of gravitational  potential. - We can look at the velocity (v) as a function of the angle (α) and find the specific α at which the skier lifts off and  departs from the snowball.

- If we ignore snow-­ski friction along with air resistance, then the one work producing force in this problem, gravity,  is conservative. Therefore the skier’s total mechanical energy at any angle α is the same as her total mechanical  energy at the top of the snowball.

- Hence, From conservation of energy we have:

                       KE (α) + PE(α) = KE(α = 0) + PE(α = 0)

                       0.2*m*v(α)^2 + m*g*r*cos(α) = 0.5*m*[ v(α = 0)]^2 + m*g*r

                       0.2*m*v(α)^2 + m*g*r*cos(α) ≈ m*g*r

                        m*v(α)^2 / r = 2*m*g( 1 - cos(α) )

- The centripetal force (due to gravity) will be mgcosα, so the skier will remain on the snowball as long as gravity  can hold her to that path, i.e. as long as:

                         m*g*cos(α) ≥ 2*m*g( 1 - cos(α) )

- Any radial gravitational force beyond what is necessary for the circular motion will be balanced by the normal  force—or else the skier will sink into the snowball.

- The expression for α_lift becomes:

                            3*cos(α) ≥ 2

                            α ≥ arc cos ( 2/3) ≥ 48.2°

4 0
2 years ago
Steve has overdrawn his checking account by $27. His bank charged him $15 for an overdraft fee. Then he quickly deposited $100.
sp2606 [1]
So... that's.... U-27... which apparently is negative 15.... so now all I have to do is subtract 15 from 100.... so.... Steve's current balance is now $85.
lol as soon as I typed "Steve", I thought of Markiplier's pet named Steve
3 0
3 years ago
Help plz dis is a lil importatnete
Goryan [66]

Following order of operations:

3^2 = 9

(10-2) = 8

Now you have :

9 + 8 x 5 -4

Multiplication is next:

9 + 40 -4

Now just add and subtract from left to right:

9 + 40 = 49

49-4 = 45

The answer is 45

8 0
2 years ago
Read 2 more answers
Rhonda can travel 45 miles in 3 hours while on her skateboard. at this rate, how many hours does it take to travel 1 mile
Rasek [7]

The question is relating Rhonda's distance travelled and time taken

If 45 miles = 3 hours

Then, 1 mile = 3/45 hours

=\frac{1}{15}

Therefore, it will take Rhonda 1/15 hours to travel 1 mile.

6 0
1 year ago
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