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3 years ago

Which best describes binary numbers ?

Mathematics

1 answer:

BlackZzzverrR [31]3 years ago

4 0

Answer:

Most likely it's B because binary numbers are only 0 and 1 which are two numbers

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Dominique is buying water. She needs 2 liters. A half-liter of water costs $2.46. A 250-milliliter container of water costs

Andrew [12]

Answer:

$\fbox{\begin{minipage}{15em}A half-liter of water costs 2.46$\end{minipage}}$

Step-by-step explanation:

Dominique wants to buy $2$ liters of water.

Case 1:

A half-liter of water costs $2.46$ .

The $2$ half-liters is $1$ liter => The cost of a liter of water ( $A$ ) is calculated by multiply the cost of $1$ half-liter by $2$ :

$A = 2.46$ x $2$ = $4.92$

=> The cost of two liters: $A_{1}$ = $A$ x $2$ = $4.92$ x $2$ = $9.84$ $

Case 2:

A quarter-liter of water costs $1.48$ .

The 4 quarter-liters is $1$ liter => The cost of a liter of water ( $B$ ) is calculated by multiply the cost of $1$ quarter-liter by $4$ :

$B = 1.48$ x $4$ = $5.92$

=> The cost of two liters: $B_{1} = 5.92$ x $2$ = $11.84$ $

Compare $A_{1}$ and $B_{1}$ , the cost of second buying method is more expensive.

=> She should buy the water, in which a half-liter of water costs $ $2.46$

Hope this helps!

4 0

3 years ago

Angie found a job with an annual salary (yearly) of $79k. What is her monthly pay

marta [7]

$79,000 divided by 12months= $6,583.33 per month

5 0

3 years ago

A model rocket is launched directly upward at a speed of 28 meters per second from a height of 12 meters. The function f(t) = -

Jet001 [13]

Answer:

6.11 seconds

Step-by-step explanation:

Given

$f(t) = -4.9t^2 + 28t + 12$

Required

When will it hit the ground?

When it hits the ground, f(t) = 0.

So, we have:

$0 = -4.9t^2 + 28t + 12$

Solve quadratic equation using formula

$t = \frac{-b \± \sqrt{b^2 - 4ac}}{2a}$

$t = \frac{-28 \± \sqrt{28^2 - 4*-4.9*12}}{2*-4.9}$

$t = \frac{-28 \± \sqrt{1019.2}}{-9.8}$

$t = \frac{-28 \± 31.92}{-9.8}$

Split

$t = \frac{-28 + 31.92}{-9.8}$ or $t = \frac{-28 - 31.92}{-9.8}$

$t = \frac{3.92}{-9.8}$ or $t = \frac{-59.92}{-9.8}$

$t = -0.4$ or $t = 6.11$

Time can not be negative. So:

$t = 6.11$

6 0

3 years ago

Describe two ways to solve the equation 2(4x-11)=10

shtirl [24]

2(4x-11) = 10

On dividing 2 on both sides

$\frac{2(4x-11)}{2} = \frac{10}{2}$

$4x-11 = 5$

On Adding 11 on both sides:

$4x-11+11 = 11+5$

$4x = 16$

On dividing both side by 4

$\frac{4x}{4} = \frac{16}{4}$

$x = 4$

Second way is:

We can use distributive property as

$2(4x-11) = 10$

$2*4x- 2*11 = 10$

$8x - 22 = 10$

On Adding 22 on both side

$8x - 22+22 = 10+22$

$8x = 32$

On dividing both side by 8

$\frac{8x}{8} = \frac{32}{8}$

$x = 4$

6 0

3 years ago

Please help me:) thank you!<3

Y_Kistochka [10]

I think your answer might be the first one

5 0

3 years ago