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2 years ago

(20 Points)

Mathematics

1 answer:

Zielflug [23.3K]2 years ago

6 0

|a-9|<=4

a-9 <=4 and a-9>=-4

Choice D

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Rohit are u here or not

saul85 [17]

yaaaa I am here what about u

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2 years ago

ok KO of mass 550 gram has three ingredients flour sugar and raisins there is twice as much as flour sugar and one and a half ti

brilliants [131]

Answer:

2S = F

1.5R = S or R = S/1.5

So flour F and sugar S and raisins R

F + S + R = 550

2S + S + S/1.5. = 550

3S + 1.5S + S = 550*1.5

5.5 S = 550*1.5

S = 100*1.5

S = 150

R= 100

And so flour ie, F = 300

4 0

2 years ago

Read 2 more answers

Question 2.1

irga5000 [103]

Answer:

x = 5.3

Step-by-step explanation:

Reference angle (θ) = 24°

Opposite side to the reference angle = x

Adjacent side = 12

Apply TOA, which is:

Tan θ = Opp/Adj

Plug in the values

Tan 24° = x/12

12*Tan 24° = x

5.34274422 = x

x = 5.3 (approximated to one decimal place)

5 0

2 years ago

Given the following exponential function, identify whether the change represents growth or decay, and determine the percentage r

RUDIKE [14]

Answer:

It represents growth, and the percentage rate of increase is of 8%

Step-by-step explanation:

Exponential equation:

An exponential equation has the following format:

$A(t) = A(0)(1 + r)^t$

In which A(0) is the initial amount and r is the rate of change, as a decimal. If positive, it is growth, if negative, it is decay.

In this question:

$y = 21(1.08)^x$

$1 + r = 1.08$

$r = 0.08$

Since r is positive, it represents growth, and the percentage rate of increase is of 0.08*100% = 8%

8 0

2 years ago

What is the wavelength for radio waves with frequency 3x10^9

lozanna [386]

Answer:

0.1 meters

Step-by-step explanation:

For an electromagnetic wave, the relationship between wavelength λ, frequency ν, and the speed of light c is given by:

$c=\lambda \nu$

where $c=3*10^8m/s.$

In our case of the radio waves $\nu=3*10^8$

therefore the wavelength λ is:

$\lambda=\frac{c}{\nu} =\frac{3*10^8}{3*10^9} =0.1m.$

Therefore the wavelength of the radio waves is 0.1 meters.

6 0

2 years ago