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2 years ago

Answer this question right and I will mark you brainliest

Mathematics

1 answer:

Alecsey [184]2 years ago

8 0

Answer:

6 phones

Step-by-step explanation:

because there are 6 dots (representing phones) past the point 14.2 hrs

Hope this helps! :) if you have anymore questions like this id be willing to help you if you want.

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0.2 (20x + 10) = -42

Finger [1]

Answer:

x = -11

Step-by-step explanation:

0.2(20x + 10) = -42

4x + 2 = -42 Distribute 0.2 to the numbers in the paranthesis

4x = -44 Add 2 to both sides

x = -11 Divide 4 from both sides

4 0

2 years ago

10. The population of India is 1.353 billion, and expected to grow at the rate of one percent

Afina-wow [57]

Answer:

39 years

Step-by-step explanation:

Adapt the formula A = P(1 + r)^n, letting P represent the original population, r the growth rate as a decimal fraction, and n the number of years.

Solve this for n:

2 billion = (1.353 billion)(1 + 0.01)^n

After simplification, we have:

--------- = 1.01^n

1.353

Taking the log of both sides, we get:

log 2 - log 1.353 = n log 1.01, or

log 2 - log 1.353 0.1697

------------------------ = -------------- = 39 years (rounded off from 39.28)

log 1.01 0.0043

8 0

2 years ago

What is the volume of the cylinder below? Use 3.14 for pi and I round to the nearest tenth

Rainbow [258]

Answer:

Option (4).

Step-by-step explanation:

Formula to calculate the volume of a cylinder is,

V = πr²h

Here r = radius of the cylinder

h = Height of the cylinder

From the figure attached,

r = $\frac{13}{2}=6.5$ cm

h = 11 cm

Now we substitute the values of h and r in the formula,

V = π(6.5)²(11)

= 464.75π

= 1459.32

≈ 1459.3 cm³

Therefore, volume of the given cylinder is 1459.3 cm³

Option (4) will be the answer.

6 0

3 years ago

If a is a negative number, then a(1/a) is equal to -1. If a is a negative number and b is a negative number, then product ab is

Firdavs [7]

Both claims are false. In fact, $a$ and $\frac{1}{a}$ are one the multiplicative inverse of the other. This means, by definition of multiplicative inverse, that

$a \cdot \dfrac{1}{a} = 1 \quad\forall a \in \mathbb{R}$

So, it doesn't matter if $a$ is positive or negative: the multiplication of one number and its inverse will always be 1: for example,

$(-2) \cdot \dfrac{1}{-2} = \dfrac{-2}{-2} = 1$

Similarly, when you multiply two number, the sign of the product depends on the sign of the factors as follows:

$(+) \cdot (+) = (+)$
$(+) \cdot (-) = (-)$
$(-) \cdot (+) = (-)$
$(-) \cdot (-) = (+)$

So, the multiplication of two negative numbers is a positive number.

8 0

2 years ago

State the range of possible values for x if (3x+5)(x-1) < 2x+7

lara31 [8.8K]

we are given with the inequality

$(3x+5)(x-1) < 2x+7\\ \\$

Open the parenthesis we get on left side we get

$(3x+5)(x-1) < 2x+7 =3x^2-3x+5x-5$

8 0

2 years ago