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
miv72 [106K]
3 years ago
13

Am I correct? Please show your work so I can compare it to my work. Thank you!

Mathematics
1 answer:
Viefleur [7K]3 years ago
4 0

Answer:

200

Step-by-step explanation:

C = 0.007x² − 2.8x + 100

There are two ways we can find the minimum.  The first is by noticing that this is an upwards parabola, so the minimum is at the vertex.  For y = ax² + bx + c, the vertex is at x = -b/(2a).

x = -(-2.8) / (2 × 0.007)

x = 200

Alternatively, we can minimize C using calculus.  Take the derivative with respect to x and set to 0:

dC/dt = 0.014x − 2.8

0 = 0.014x −  2.8

x = 200

You might be interested in
from this year to ten years later, the number of people employed as physician assistants in the country is expected to increase
wariber [46]

Answer:

101430

Step-by-step explanation:

  • 69000=100 what about 147%. 69000×147/100=101430
8 0
2 years ago
Jbcjkbcjkbdkcvdc ndbljbvv1
Elina [12.6K]
Jdkdhkshsoshsisihksjdodid
8 0
2 years ago
Kate's swim coach informs her that she only has 35% of her workout left. Kate has swum 26 laps so far.
pentagon [3]
Kate needs to swim 40 laps to come complete 66 laps
7 0
3 years ago
Can someone help me with number 8?
Hoochie [10]

Answer:

Step-by-step explanation:

I cant really see it post it again

6 0
2 years ago
For every 3 laps that Jackie swims, Ronnie swims 4 laps. During practice, they swam a combined total of 63 laps. How many laps d
Flura [38]

Answer:

36 laps Ronnie swim during practice .

Step-by-step explanation:

Let us assume that the laps that Ronnie swims be x .

Let us assume that the laps that Jackie swims be y .

As given

For every 3 laps that Jackie swims, Ronnie swims 4 laps.

i.e

3 × laps that Ronnie swims = 4 × laps that Jackie swims

3 × x = 4 × y

3x = 4y

Equation becomes

x + y  = 63

Thus by using 3x = 4y .

y = \frac{3x}{4}

Thus

x +\frac{3x}{4} = 63

4x + 3x = 63 × 4

7x = 252

x = 36

Put the value of x in the equation x + y  = 63

36 + y = 63

y = 63 - 36

y = 27

Therefore the 36 laps Ronnie swim during practice .

4 0
3 years ago
Other questions:
  • Natalie uses 68 photos to make an online photo album. She can fit 5 photos on each page. She fills all of the pages in her album
    15·1 answer
  • Given the polynomial 6x3 + 4x2 − 6x − 4, what is the value of the constant 'k' in the factored form? 6x3 + 4x2 − 6x − 4 = 2(x +
    8·2 answers
  • What appears to be the domain of the part of the exponential function graphed on the grid
    6·1 answer
  • Please answer fully​
    9·1 answer
  • Can someone plz help me with this one problem plz!!!
    6·2 answers
  • If it takes Ohenhen 10km to pass to Emma and it takes Emma 8km to pass to Omusi and considering Ohenhen & Omusi are at perpe
    9·1 answer
  • [ MATH, PLEASE HELP. WILL GIVE BRAINLIEST TO CORRECT ANSWER ]
    13·1 answer
  • A square metallic frame has a perimeter 208cm .It is bent in the shape of a circle. Find the area of the circle.​
    14·1 answer
  • Ill mark brainlest if correct
    10·1 answer
  • If the bottom row as a result of sythetic division is 1 3 0 4 0, then the quotient is which of the following? Select one:
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!