All of the following are examples of units except

1 answer:

riadik2000 [5.3K]2 years ago

3 0

Looking at the choices one by one
a. weight - it is a physical property and not a unit
b. kilometer - it is a unit of distance
c. gram - it is a unit of mass
d. teaspoon - it is a unit of volume

Therefore, all the choices are examples of units except for
a. weight

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Help 10 Points PLEASE<br> AND Thank you

NARA [144]

2.57 x 10^4 is 100,000 times greater than 2.57 x 10^-1

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7 0

3 years ago

You are planning to make an open rectangular box from a 25-in.-by-49-in. piece of cardboard by cutting congruent squares from

Darya [45]

Answer:

The dimensions of the box are 38.48 x 14.48 x 5.26 in.

Step-by-step explanation:

We will have a piece of cardboard with squares of side x cut from the corners to make a open box.

The volume of the box can be written as:

$V=A\cdot B\cdot x\\\\V=(49-2x)\cdot (25-2x)\cdot x\\\\V=x\cdot (4x^2-2x*(49+25)+49*25)\\\\V=4x^3-148x^2+1225x$

To calculate the maximum volume, we derive and equal to zero

$dV/dx=12x^2-296x+1225=0$

We apply the quadratic equation to know the roots of the equation

$x=\frac{-b\pm\sqrt{b^24ac}}{2a}\\\\x=\frac{296\pm\sqrt{296^2-4*12*1225}}{2*12} =\frac{296\pm\sqrt{87616-58800}}{24}= \frac{296\pm\sqrt{28816}}{24}\\\\x=\frac{296\pm169.75}{24}= 12.333\pm7.073\\\\\\x_1=12.333+7.073=19.406\\\\x_2=12.333-7.073=5.26$