Question

Math question please show work due today last day to submit Assignments or I fail please help

Answer 1

Answer:

A. 41

B. 1,590

C. .1

Step-by-step explanation:

A.

the equation is l*w=A

9.2*4.5=A

41.4=A

rounded it would be 41

B.

the equation is pi*r^2=A

3.14*22.5^2=A

3.14*506.25=A

1,589.6=A

^round this up to get 1,590

C.

what I did was use a*b/2 to find one side then add the other side (less complicated in my opinion)

.5*.2/2=A

.1/2=A

.05=A

.05+.05=0.1

Answer 2

Answer:

$\text{a. }41.4\:\mathrm{m^2},\\\text{b. }1590.4\:\mathrm{cm^2},\\\text{c. }0.1\:\mathrm{m^2}$

Step-by-step explanation:

Part A:

The figure implies a rectangle. The area of a rectangle with base $b$ and height $h$ is given by $A=bh$.

What we're given:

• $b$ of 9.2
• $h$ of 4.5

Therefore, the area of the rectangle is $9.2\cdot 4.5=\boxed{41.4\:\mathrm{m^2}}$

Part B:

The figure shows a circle. The area of a circle with radius $r$ is given by $A=r^2\pi$. In the figure, the diameter is marked as 45 cm. To find the radius, we must divided this by 2, because by definition, the radius if half the diameter. Therefore, $r=\frac{45}{2}=22.5\:\mathrm{cm}$ and the area of this circle, rounded to the nearest tenth, is $22.5^2\pi=1590.43128088\approx \boxed{1590.4\:\mathrm{cm^2}}$

Part C:

The figure shows a triangle (polygon with three sides). The area of a triangle with base $b$ and height $h$ is given by $A=\frac{1}{2}bh$.

What we're given:

• $b$ of 0.4
• $h$ of 0.5

Substituting given values, we get:

$A=\frac{1}{2}\cdot 0.4\cdot 0.5=\boxed{0.1\:\mathrm{m^2}}$