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Misha Larkins [42]
3 years ago
6

Suzy can type 39 words in 36 seconds. At this rate, how many words can she type in 1 minute?

Mathematics
1 answer:
valentinak56 [21]3 years ago
4 0
1,104

I multiplied it
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An elephant has a mass of 4500 kilograms. How many mice, with a mass of 2×10−2 kilogram each, would it take to equal the mass of
eimsori [14]

Answer:225000 mice

Step-by-step explanation:

Mass of elephant=4500kg

Mass of mice=2x10^(-2)=2/100 kg

Let y be there number of mice

2/100 x y=4500

2y/100=4500

Cross multiply

2y=4500 x 100

2y=450000

Divide both sides by 2

2y/2=450000/2

y=225000

3 0
3 years ago
Find the dimensions of the shaded region so that its area is maximized.<br> x=<br> y=
musickatia [10]
1.  Find the equation of the line AB.  For reference, the answer is y=(-2/3)x+2.
2.  Derive a formula for the area of the shaded rectange.  It is A=xy (where x is the length and y is the height).
3.  Replace "y" in A=xy with the formula for y:  y= (-2/3)x+2:
       
                 A=x[(-2/3)x+2]    This is a formula for Area A in terms of x only.
4.  Since we want to maximize the shaded area, we take the derivative with respect to x of    A=x[(-2/3)x+2] , or, equivalently, A=(-2/3)x^2 + 2x.
This results in   (dA/dx) = (-4/3)x + 2.
5.  Set this result = to 0 and solve for the critical value:  

(dA/dx) = (-4/3)x + 2=0, or (4/3)x=2   This results in x=(3/4)(2)=3/2

6.  Verify that this critical value x=3/2 does indeed maximize the area function.
7.  Determine the area of the shaded rectangle for x=3/2, using the previously-derived formula          A=(-2/3)x^2 + 2x.

The result is the max. area of the shaded rectangle.
3 0
3 years ago
Please help! I will mark you as brainliest!
mamaluj [8]

Answer:

Step-by-step explanation:

The purple circle, not ring is pi 7 squared = 153.93804

Then subtract the smaller circles area (pi 4 squared) = 153.9... - 103.6725576 =

50.2654824

Purple ring is 50.2654824

The entire circle is 4+3+3 (10) squared times pi = 314.1592654

( 50.2654824 / 314.1592654 ) x 100 = 15.999999998 %

4 0
3 years ago
Find the perimeter of the regular polygon 7x+4 5(x + 2) - 1​
Marina CMI [18]

Answer:

x= 3/7 i.d.k if this is correct I did it in my brain

7 0
2 years ago
Simplify the expressions by combining like terms<br><br> 4r + 9r - 11r + 7r
konstantin123 [22]
9r
Explanation:
4r + 9r = 13r
13r-11r = 2r
2r + 7r = 9r
4 0
3 years ago
Read 2 more answers
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