# Built-up area

John build up area 5 x 7 = 35 m

^{2}with building with a wall thickness 30 cm. How many centimeters would have to subtract from thickness of the walls that built-up area fell by 9%?**Result****Leave us a comment of example and its solution (i.e. if it is still somewhat unclear...):**

**Showing 0 comments:**

**Be the first to comment!**

#### To solve this example are needed these knowledge from mathematics:

## Next similar examples:

- Normal distribution GPA

The average GPA is 2.78 with a standard deviation of 4.5. What are students in the bottom the 20% having what GPA? - Air pressure

The meteorological station measured the air pressure of 1060 hPa (hectopascals). In addition to measuring instruments, there is a residential house that has a flat roof with dimensions of 10 m and 28 m. What pressure force in MN (meganewtons) force the ai - Area of rectangle

Calculate the area of rectangle in square meters whose sides have dimensions a = 80dm and b = 160dm. - Area

Calculate: ? - The length

The length of a rectangle is 6 meters less than twice the width. If the area of the rectangle is 216 meters, find the dimensions of the rectangle. - Combinations

From how many elements we can create 990 combinations 2nd class without repeating? - Variations 4/2

Determine the number of items when the count of variations of fourth class without repeating is 600 times larger than the count of variations of second class without repetition. - Combinations

How many elements can form six times more combinations fourth class than combination of the second class? - Theorem prove

We want to prove the sentense: If the natural number n is divisible by six, then n is divisible by three. From what assumption we started? - Roots

Determine the quadratic equation absolute coefficient q, that the equation has a real double root and the root x calculate: ? - Discriminant

Determine the discriminant of the equation: ? - Quadratic equation

Find the roots of the quadratic equation: 3x^{2}-4x + (-4) = 0. - Equation

Equation ? has one root x_{1}= 8. Determine the coefficient b and the second root x_{2}. - Quadratic inequation

If 5x + x² > 100, then x is not - A perineum

A perineum string is 10% shorter than its original string. The first string is 24, what is the 9th string or term? - Quadratic function 2

Which of the points belong function f:y= 2x^{2}- 3x + 1 : A(-2, 15) B (3,10) C (1,4) - Im>0?

Is 6i a positive number?