From the question, we are informed that Denise wants to cover a 21.75 square foot wall with weathered wood and that each box of weathered wood contains 1.5 square feet of wood.

The number of boxes of weathered wood that she need will be calculated by dividing 21.75 square feet by 1.5 square feet. This will be:

= 21.75/1.5

= 14.5

= 15 boxes approximately

6 0

3 years ago

Express the complex number in trigonometric form. -2i

katrin [286]

$-2i=2\left(\cos\left(-\dfrac\pi2\right)+i\sin\left(-\dfrac\pi2\right)\right)=2\left(\cos\dfrac\pi2-i\sin\dfrac\pi2\right)$

7 0

4 years ago

Can anyone answer this question???

Leona [35]

Answer:

E = 216 joules

Step-by-step explanation:

The given equation is

E = $\frac{m*v^{2} }{2}$ ............(i)

Here

m = 3 kg

v = 12 m/s

Putting the given values in equation (i)

E = $\frac{3*12^{2} }{2}$

E = $\frac{3*144}{2}$

E = $\frac{432}{2}$

E = 216 kg m² /s²

E = 216 joules

6 0

3 years ago