All categories

3 years ago

PLZ HELP ?

Mathematics

2 answers:

ollegr [7]3 years ago

5 0

I think it’s seventy five

lawyer [7]3 years ago

3 0

Answer:

Step-by-step explanation:

You might be interested in

What is the decibel level of the radio with intensity 10−7 watts per square inch? Use a logarithmic model to solve.

BaLLatris [955]

Answer:

$D = 50$

Step-by-step explanation:

Given

$I = 10^{-7}W/m^2$ --- Intensity

Required

Determine the decibel level (D)

This is calculated as:

$D = 10 * log(\frac{I}{I_n})$

Where:

$I_n =$ The threshold intensity

$I_n =1 * 10^{-12}W/m^2$

So, we have:

$D = 10 * log(\frac{I}{I_n})$

This gives:

$D = 10 * log(\frac{10^{-7}W/m^2}{1 * 10^{-12}W/m^2})$

$D = 10 * log(\frac{10^{-7}}{10^{-12}})$

Apply law of indices

$D = 10 * log(10^{-7--12})$

$D = 10 * log(10^{5})$

Apply law of logarithm

$loga^b = b\ log(a)$

So, we have:

$D = 10 * 5 * log(10)$

$log(10) =1$

So:

$D = 10 * 5 *1$

$D = 50$

Hence, the decibel level is 50

7 0

3 years ago

Please help!!!!!

SCORPION-xisa [38]

(0,3) and (2,8)
slope = (8-3)/(2-0) = 5/2 = 2.5

answer

The slope is ________
c. 2.5

The slope represents _______
c. cost per mile traveled

6 0

3 years ago

Bianca and Meredith are sisters. Meredith's height is 23 of Bianca's height plus 32 inches. Meredith is 60 inches tall. M Write

Anna [14]

Answer:

The height of Bianca = 42 inches

Step-by-step explanation:

The given height of Meredith = 60 inches

Let us assume the height of Bianca = x inches

Now, given Meredith's height = 2/3 of Bianca's Height + 32 inches

$\implies 60 = \frac{2}{3 } \times x + 32$

or, $\frac{2}{3 } \times x = 60 -32 = 28\\\implies x = 28 \times \frac{3}{2 } = 42$

or, x = 42

Hence the given height of Bianca = x = 42 inches

5 0

3 years ago

Read 2 more answers

37000000000000-187000000000

densk [106]

Answer:

37000000000000 - 187000000000 = 36813000000000

Step-by-step explanation:

Use long subtraction to evaluate.

Hope this helps! Have a nice day!

4 0

3 years ago

Read 2 more answers

Please help with this math problem

VashaNatasha [74]

-1 = (x-1)/3
(multiply both sides by 3)
-3 = x-1
(add 1 on both sides)
x=-2

7 0

3 years ago

Read 2 more answers