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2 years ago

X squared minus 39x+74=0

Mathematics

1 answer:

Romashka [77]2 years ago

5 0

Answer:

-74

Step-by-step explanation:

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A can of beans has surface area 337 cm2. It's heights is 11cm. What is the radius of the circular top?

Karolina [17]

Answer:

3.66 cm

Step-by-step explanation:

r = Radius of cylinder

h = Height of the cylinder = 11 cm

A = Total surface area of the cylinder = $337\ \text{cm}^2$

Total surface area of a cylinder is given by

$A=2\pi r^2+2\pi rh\\\Rightarrow A=2\pi r(r+h)\\\Rightarrow \dfrac{A}{2\pi}=r^2+rh\\\Rightarrow r^2+rh-\dfrac{A}{2\pi}=0\\\Rightarrow r^2+11r-\dfrac{337}{2\pi}=0\\\Rightarrow r^2+11r-53.64=0\\\Rightarrow 100r^2+1100r-5364=0\\\Rightarrow r=\dfrac{-1100\pm \sqrt{1100^2-4\times 100\left(-5364\right)}}{2\times 100}\\\Rightarrow r=3.66,-14.65$

So, the radius of the circular top is 3.66 cm.

6 0

3 years ago

A club with 50 college students is doing volunteer work this semester. Each student is volunteering at one of four locations. He

Yuliya22 [10]

Answer: Our required probability is 0.58.

Step-by-step explanation:

Since we have given that

Number of students worked in Nursing home = 11

Number of students worked in Tutoring center = 13

Number of students worked in Soup kitchen = 8

Number of students worked in Library = 18

Total number of students = 50

Since 3 students are selected from the club.

We need to find the probability that none of the three students volunteer at the soup kitchen.

So, Remaining students would be 50-8 = 42

So, probability that none of three students at the soup kitchen is given by

$\dfrac{^{42}C_3}{^{50}C_3}\\\\=0.58$

Hence, our required probability is 0.58.

4 0

4 years ago

Is 12,000,000 the standard form of 1.2 times 10 to the negative 7 power?

OleMash [197]

Answer: No. To the contrary, "12,000,000" is the "standard form" of
"1.2 times 10 to the POSITIVE 7 power.

That is; "12,000,000 = 1.2 * 10⁷ " .
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4 years ago

42/9 in mixed fraction

Anna007 [38]

The answer is 4 2/3 :)

3 0

3 years ago

15*x+3 = x-6 solve equation

Ber [7]

Answer:

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers