Solve D=1/2(0.642)3^2

$$D = \frac{ 1 }{ 2 } (0.642) { 3 }^{ 2 }$$

Solve for D

$$D=2.889$$

Steps for Solving Linear Equation

Convert decimal number 0.642 to fraction \frac{642}{1000}. Reduce the fraction \frac{642}{1000} to lowest terms by extracting and canceling out 2.

$$D=\frac{1}{2}\times \frac{321}{500}\times 3^{2}$$

Multiply \frac{1}{2} times \frac{321}{500} by multiplying numerator times numerator and denominator times denominator.

$$D=\frac{1\times 321}{2\times 500}\times 3^{2}$$

Do the multiplications in the fraction \frac{1\times 321}{2\times 500}.

$$D=\frac{321}{1000}\times 3^{2}$$

Calculate 3 to the power of 2 and get 9.

$$D=\frac{321}{1000}\times 9$$

Express \frac{321}{1000}\times 9 as a single fraction.

$$D=\frac{321\times 9}{1000}$$

Multiply 321 and 9 to get 2889.

$$D=\frac{2889}{1000}$$

Assign D

$$D≔2.889$$