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2 years ago

15

A certain rechargeable battery is advertised to recharge up to 99% of its previous capacity with every charge. If its initial ca

pacity is 8 hours of life, how many hours should the battery last?
A. 200
B. 400
C. 600
D. 800

1 answer:

lakkis [162]2 years ago

6 0

The answer of this question is D

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5 năm trước tổng số tuổi của hai mẹ con là 55 tuổi. Hiện nay tuổi con bằng 4/9 lần tuổi mẹ. Tính số tuổi của mẹ và tuổi con hiện

soldi70 [24.7K]

Answer:

12

Step-by-step explanation:

12

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2 years ago

A survey about the student government program at a school finds the following results 190 students like the program 135 Students

Butoxors [25]

190+135+220=445. 360(the degrees in a circle)/445(the number of students)=0.81. Each student is worth 0.81 degrees. 0.81x190(the number of students that like the program)=135.9. That rounds up or 136 so the answer is 136 degrees.

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3 years ago

What is the equation of the line shown in this graph

prisoha [69]

Slope = (2+4)/(1-4) = 6/-3 = -2
passing thru (1.2)
y = mx + b
b = y - mx
b = 2 - (-2)(1)
b = 2 + 2
b = 4

equation
y = -2x + 4

7 0

2 years ago

Consider the proof. Given: In △ABC, BD ⊥ AC Prove: the formula for the law of cosines, a2 = b2 + c2 – 2bccos(A) Statement Reason

loris [4]

Solution: The missing reason in Step 8 is substitution of $x=c\cos (A)$ .

Explanation:

The given steps are used to prove the formula for law of cosines.

From step 5 it is noticed that our equation is

$a^2=b^2-2bx+c^2$ ..... (1)

From step 7 it is noticed that the value of $x$ is $c\cos (A)$ .

So by substituting $c\cos (A)$ for $x$ in equation (1) we get the equation of step 8, i.e.,

$a^2=b^2-2bc\cos (A)+c^2$

Hence, the missing reason in Step 8 is substitution of $x=c\cos (A)$ .

5 0

3 years ago

Read 2 more answers

Find the slope of a line from these two coordinates.

tankabanditka [31]

This is wrong.

It's supposed to be -4/15.

But try -4/5.

7 0

2 years ago