1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Zinaida [17]
3 years ago
12

.

Mathematics
1 answer:
brilliants [131]3 years ago
7 0
\sf Hello!

\sf Let\: the \:required % \sf be\: x

\sf Then,

\sf x % × \sf 50 = \sf 9

⇒ \dfrac{\sf x}{\sf 100} × \sf 50 = \sf 9

⇒ \dfrac{\sf x}{\sf 2} = \sf 9

⇒ \sf X = \sf 9 × 2

⇒ \boxed{\sf x = 18}

\sf Therefore,
\sf D.\: 18 % \sf of \:50\: is \:9

~ \sf iCarl
You might be interested in
What is 2 3/5 multiplied by 2 as a mixed number or fraction
Bond [772]

Answer:

5 1/5

Step-by-step explanation:

2 3/5 * 2= 5 1/5


mark brainliest  :)

7 0
3 years ago
A pizza pan is removed at 9:00 PM from an oven whose temperature is fixed at 450°F into a room that is a constant 70°F. After 5​
gladu [14]

Answer:

A) It will get to a temperature of 125°F at 9:19 PM

B) It will get to a temperature of 150°F at 9:16 PM

C) as time passes temperature approaches the initial temperature of 450°F

Step-by-step explanation:

We are given;

Initial temperature; T_i = 450°F

Room temperature; T_r = 70°F

From Newton's law of cooling, temperature after time (t) is given as;

T(t) = T_r + (T_i - T_r)e^(-kt)

Where k is cooling rate and t is time after the initial temperature.

Now, we are told that After 5​ minutes, the temperature is 300°F.

Thus;

300 = 70 + (450 - 70)e^(-5k)

300 - 70 = 380e^(-5k)

230/380 = e^(-5k)

e^(-5k) = 0.6053

-5k = In 0.6053

-5k = -0.502

k = 0.502/5

k = 0.1004 /min

A) Thus, at temperature of 125°F, we can find the time from;

125 = 70 + (450 - 70)e^(-0.1004t)

125 - 70 = 380e^(-0.1004t)

55/380 = e^(-0.1004t)

In (55/380) = -0.1004t

-0.1004t = -1.9328

t = 1.9328/0.1018

t ≈ 19 minutes

Thus, it will get to a temperature of 125°F at 9:19 PM

B) Thus, at temperature of 150°F, we can find the time from;

150 = 70 + (450 - 70)e^(-0.1004t)

150 - 70 = 380e^(-0.1004t)

80/380 = e^(-0.1004t)

In (80/380) = -0.1004t

-0.1004t = -1.5581

t = 1.5581/0.1004

t ≈ 16 minutes.

Thus, it will get to a temperature of 150°F at 9:16 PM

C) As time passes which means as it approaches to infinity, it means that e^(-kt) gets to 1.

Thus,we have;

T(t) = T_r + (T_i - T_r)

T_r will cancel out to give;

T(t) = T_i

Thus, as time passes temperature approaches the initial temperature of 450°F

6 0
3 years ago
4 teammates shared 5 granola bars equally how much each brother gets
MAXImum [283]
1 full one and a fourth of another
5 0
3 years ago
Determine the coordinate of each labeled point on the following graph
RSB [31]
A= 3,3
B= -2,3
C=-1,-1
D=1,-3
8 0
3 years ago
Which number is both a factor and a multiple of 14? A, 1 7 B. 14 C.28
zloy xaker [14]

Answer:

Step-by-step explanation:

The multiples of 14

Answer : 14,28,42,56,70,84,98,112,126,140,154,168,182,196,210,224,238,252,266,280,294,308,322,336,350,364,378,392,406,420,434,448,462,476,490,504,518,532,546,560,574,588,602,616,630,644,658,672,686,

7 0
3 years ago
Other questions:
  • Multi-Step Inequalities with Distributive Property <br> Solve<br> 3(x+4)&gt;21
    9·2 answers
  • 4n-40=-14n+14 how do I solve this ?
    11·2 answers
  • Please help! If the two triangles are similar, which equation represents the value of side x?
    9·1 answer
  • How do i evaluate 3X + y for X = 2 and y = -1
    13·2 answers
  • 4⋅(1/4^−3)+12 <br> What would be the answer. Please helpp
    6·2 answers
  • Sketch the region enclosed by the given curves. Decide whether to integrate with respect to x or y. Draw a typical approximating
    15·1 answer
  • An ion channel can be in either open (O) or closed (C) states. If it is open, then it has probability 0.1 of closing in 1 micros
    13·1 answer
  • What is the GCF? 2x2-4x+8
    8·1 answer
  • Fine slope intercept form <br> y = x+7 (2, 3)<br> Help please and thanks
    15·1 answer
  • Luca made a scale drawing of the auditorium. in real life, the stage is 45 feet long. it is 18
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!