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3 years ago

13

Please help me with these questions I’m not very good with This topic

2 answers:

Zarrin [17]3 years ago

6 0

Yes. (1000mg=1g) (1L=mL) (160cm=1600mm) (14km=14000m) (109g=0.109kg) (250m=0.25km)

56cm < 6cm

7g > 698mg

Levart [38]3 years ago

3 0

Use an online converter that you may search for on google. com, and learn the method too

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The profile of the cables on a suspension bridge may be modeled by a parabola. The central span of a bridge is 1270 ft long and

deff fn [24]

Answer:

Step-by-step explanation:

Given

span of bridge $L=1270\ ft$

height of span $h=157\ ft$

Equation of Parabola

$y=0.00039x^2$

$|x|$ i.e.

$-635$

$\frac{dy}{dx}=2\times 0.00039$

length of Arc $=\int_{a}^{b}\sqrt{1+(\frac{dy}{dx})^2}$

$=\int_{-635}^{635}\sqrt{1+(\frac{dy}{dx})^2}$

$=\int_{-635}^{635}\sqrt{1+(0.00078x)^2}$

$=2\times \int_{0}^{635}\sqrt{1+(0.00078x)^2}$

$=2\times (660.08)$

$=1320.16\ ft$

4 0

2 years ago

Dy/dx = y/x , y(1) = −2

s2008m [1.1K]

Start with

$\dfrac{dy}{dx}=\dfrac{y}{x}$

Separate the variables:

$\dfrac{dy}{y} = \dfrac{dx}{x}$

Integrate both parts:

$\displaystyle \int \dfrac{dy}{y} = \int\dfrac{dx}{x}$

Which implies

$\log(y) = \log(x)+c$

Solving for y:

$y = e^{\log(x)+c} = e^{\log(x)}e^c=xe^c$

Since $e^c$ is itself a constant, let's rename it $c_1$ .

Fix the additive constant imposing the condition:

$y(1) = c_1\cdot 1 = -2\iff c_1=-2$

So, the solution is

$y(x) = -2x$

5 0

2 years ago

Evaluate the expression 12-3y÷2+y(2y-4÷y) for y=3

ehidna [41]

Answer:

12 - 3 y ÷ 2 + y( 2 y - 4 ÷ y ) = 21.51.

Step-by-step explanation:

Here, the given expression is:

12 - 3 y ÷ 2 + y( 2 y - 4 ÷ y )

Now, we need to evaluate the given expression for y = 3

12 - 3 y ÷ 2 + y( 2 y - 4 ÷ y ) by the rule of BODMAS

12 - 3 y ÷ 2 + y( 2 y - 4 ÷ y ) = 12 - 3(3) ÷ 2 + 3(2(3) -4 ÷ 3)

= 12 - 9 ÷ 2 + 3( 6 - 4 ÷ 3)

= 12 - <u>9</u><u> ÷ 2</u> + 3( 6 - <u>4 ÷ </u><u>3</u>)

= 12 - <u>4.5</u> + 3( 6 - <u>1.33</u>)

= 7.5 + 3(4.67)

= 7.5 + 14.01

= 21.51

So, 12 - 3 y ÷ 2 + y( 2 y - 4 ÷ y ) for y = 3 is 21.51.

8 0

2 years ago

Read 2 more answers

MaRussiya [10]

$(-5)^{-6}(-5)^9$

$= (-5)^{-6+9}$

$= (-5)^{3}$

$(4 \times 10^{10})(9 \times 10^{-6})$

$= 36 \times 10^{10-6}$

$= 36 \times 10^{4}$

3 0

3 years ago

How many 2 inch segments are there is 12 ft?<br><br> A: 72<br><br> B: 24<br><br> C: 10<br><br> D: 6

o-na [289]

The answer is A.72
to solve you would multiply 12 by 12 to find the number of inches then you would divide by 2

5 0

2 years ago

Read 2 more answers