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3 years ago

Describe the error in evaluating the power: (0.4)^2=2(0.4)=0.8 PLEASE HELP ME!!!

2 answers:

6 0

(0.4)² = (0.4).(0.4) = 0.16

His error is, instead of raising (0.4) to exponent 2, he multiplied (0.4) by 2 , obviously which is wrong

Kipish [7]3 years ago

6 0

What class is this?!!

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45% of the student body at a local high school work part-time. 80% of the students who do not part-time love math whereas only 6

Mama L [17]

Answer:

71%

Step-by-step explanation:

I think the easiest way to think of this is to pretend that there are a total of 100 students at the high school, so that means the amount of people who work part time is 45% of 100 = 45 people. If 60% of those students love math, you do 0.6 * 45 = 27 people.

Next, 80% of the students who do not have a part time job (100 - 45 = 55) love math, so 0.8 * 55 = 44 people.

44 + 27 = 71, so the percent is 71/100 = 71%.

let me know if any part of that doesn't make sense

3 0

2 years ago

The length of a rectangle is twice its width. Given the length of the diagonal is $5\sqrt{5}$, find the area of the rectangle.

lianna [129]

Answer: Area of rectangle is 50 square units.

Step-by-step explanation:

Since we have given that

Diagonal of the rectangle = 5√5

Let the width of rectangle be 'x'

Let the length of rectangle be '2x'

As we know the formula for diagonal of rectangle:

$5\sqrt{5}=\sqrt{l^2+w^2}\\\\(5\sqrt{5}})^2=(2x)^2+x^2\\\\125=4x^2+x62\\\\125=5x^2\\\\\dfrac{125}{5}=x^2\\\\25=x^2\\\\x=\sqrt{25}\\\\x=5\ units$

So, Length of rectangle be 2x=2×5=10 units

And the area of the rectangle is given by

$Area=Length\times width\\\\Area=10\times 5\\\\Area=50\ sq.\ unit$

Hence, area of rectangle is 50 square units.

5 0

2 years ago

A group of scientists studied the amount of erosion at a beach. The scientist determined that the equation y=-0.5x+26 models the

daser333 [38]

Answer:

Try A

Step-by-step explanation:

8 0

2 years ago

Polygon ABCD has the following vertices:

yKpoI14uk [10]

9514 1404 393

Answer:

(b) 38.5

Step-by-step explanation:

The polygon is a trapezoid with bases 4 and 7 and height 7. Its area is given by the formula ...

A = (1/2)(b1 +b2)h

A = (1/2)(4 +7)(7) = 77/2

A = 38.5 . . . . square units

8 0

3 years ago

Please Help ASAP!! Will give BRANLIEST!! f(x)=16 f(4)=3x+5 g(x)=2x^2-4 h(x) = -3x-9

Nata [24]

Answer:

it equals 91

Step-by-step explanation:

which is ur answer and yw :)

7 0

3 years ago

Read 2 more answers