What is 39/40 simplified

Answers

Answer 1

Answer: It cannot be simplified,
but in decimal it is
0.975

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Find the Surface Area and Volume of Sphere with radius 12 cm.

Answers

$Radius:r=12cm\n\nSurface\ area:\nA=4\pi r^2\to A=4\pi\cdot12^2=4\pi\cdot144=576\pi\ (cm^2)\n\nVolume:\nV=(4)/(3)\pi r^3\to V=(4)/(3)\pi\cdot12^3=(4)/(3)\pi\cdot1728=4\pi\cdot576=2304\pi\ (cm^3)$

The surface area of a sphere is 4 pi R² = 576 pi = 1,809.6 cm² (rounded)

The volume of a sphere is 4/3 pi R³ = 2,304 pi = 7,238.2 cm³ (rounded)

Which are zeros of the following polynomial? 6x 2 - 11x - 10 = 0

Answers

Hello,

0=6x²-11x-10=6x²-15x+4x-10=3x(2x-5)+2(2x-5)=(2x-5)(3x+2)

Zeroes are: x=5/2 and x=-2/3

Answer:

The zeros of the given polynomial $6x^2-11x-10=0$ are $(5)/(2)$ and $(-2)/(3)$ .

Step-by-step explanation:

Consider the given polynomial,

$6x^2-11x-10=0$

We have to find the zeros of the given quadratic equation,

Solving using middle term splitting method,

-11x can be written as a sum of -15x and 4x and it will given product as -60.

The equation thus can be written as,

$6x^2-11x-10=0$

$\Rightarrow 6x^2+4x-15x-10=0$

$\Rightarrow 2x(3x+2)-5(3x+2)=0$

$\Rightarrow (2x-5)(3x+2)=0$

$\Rightarrow x=(5)/(2)$ and $\Rightarrow x=(-2)/(3)$

Zeros satisfies the polynomial , when we put them back in the equation, it must give result as zero.

Thus, the zeros of the given polynomial $6x^2-11x-10=0$ are $(5)/(2)$ and $(-2)/(3)$

One person can do a certain job in ten minutes, and another person can do the same job in fifteen minutes. How many minutes will they take to do the job together? 4 min 5 min 6 min

Answers

A can do 1 job in 10 min. means 1/10 job per min.
B can do 1/15 job per min.

together A&B can do 1/10+1/15 =1/6 job per min.

1/6 job they spend 1 min
1 spend 1x1/(1/6) = 6 min

Final answer:

The first person completes a job in 10 minutes and the second person completes the same job in 15 minutes. When they work together, they can do the job in 6 minutes.

Explanation:

This question pertains to the concept of rate of work. Work rate is generally described as the amount of work done per unit time. The first person completes the job in ten minutes, so their work rate is 1 job per 10 minutes. The second person completes in fifteen minutes, so their work rate is 1 job per 15 minutes.

When they work together, their rates of work add up. Therefore, the rate at which they complete the work together is (1 job/10 minutes) + (1 job/15 minutes).

Convert these rates to a common denominator (30) to simplify the calculation: (30 jobs/300 minutes)+(20 jobs/300 minutes) equals 50 jobs/300 minutes.

Therefore, together, they can do 50 jobs in 300 minutes. Hence, to do 1 job, they will need 300 minutes / 50 = 6 minutes.

Learn more about Rate of Work here:

brainly.com/question/32225531

#SPJ11

2x +1 = 5
List the 2 steps to solve and the
solution.

Answers

2x = 4
x= 2

U first subtract 1 on both sides to combine like terms

Answer:

(This way you have to solve for x)

way 1

step 1: 2x+=5

step 2: 2x=5-1

step 3: 2x=4

answer x=2

(This way you have to solve by rewriting in standard form)

way 2

step 1: 2x+1=5

step 2: 2x=5-1

step 3: 2x=4

answer x=2

Step-by-step explanation:

Suppose you own a rowboat and sometimes go rowing in the summer. In June, you are planning to go rowing with two of your friends (three people total in the boat), and in July, you are planning to go rowing with just one friend (two people total in the boat). Will you put in more effort (row harder) on the three-person trip or on the two-person trip?

Answers

Answer:

The three-person trip require more effort (row harder) than the two person-trip

Step-by-step explanation:

The number of persons in the boat determines the mass of the boat

The mass of the boat with three people in total is more than the mass of the boat with only two person's

Mass is a measure of inertia, which is the resistance of a body to accelerate, and therefore, to the application of a force

Therefore, on the three-person trip were three people are in the boat, the boat has more mass, and therefore more inertia and will require more effort (force) than on the two-person trip that has a lesser mass

in this triangle, the product of sin b and tan c is , and the product of sin c and tan b is . nextreset

Answers

The triangle is a right triangle with:1) leg c opposed to angle C.2) leg b opposed to angle B.3) hypotenuse, a, opposed to angle A.So, using the definitions of the trigonometric ratios, you get:1) sin C = opposite leg / hipotenuse = c / a.2) tan B = opposite leg / adjacent leg = b / c=> sin C * tan B = [c / a] * [b / c] = b / a.Answer: b / a

Answer:

the answer is a/b

Step-by-step explanation:

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