`0.0005 xx 76xx10^(3) + ? = 170% ` of 29.98

Options

A. 12
B. 16
C. 18
D. 15

Answer

To solve the equation \(0.0005 \times 76 \times 10^{3} + ? = 170\% \text{ of } 29.98\), we will follow these steps:

### Step 1: Calculate \(170\%\) of \(29.98\)
To find \(170\%\) of \(29.98\), we can convert the percentage to a decimal and multiply:
\[ 170\% = \frac{170}{100} = 1.7 \]
Now, we calculate:
\[ 1.7 \times 29.98 \approx 1.7 \times 30 = 51 \]
(We approximate \(29.98\) to \(30\) for easier calculation.)

### Step 2: Calculate \(0.0005 \times 76 \times 10^{3}\)
Now, we calculate the left side of the equation:
\[ 0.0005 \times 76 \times 10^{3} \]
First, calculate \(0.0005 \times 10^{3}\):
\[ 0.0005 \times 10^{3} = 0.5 \]
Now, multiply by \(76\):
\[ 0.5 \times 76 = 38 \]

### Step 3: Set up the equation
Now we have:
\[ 38 + ? = 51 \]

### Step 4: Solve for \(?\)
To find \(?\), we subtract \(38\) from \(51\):
\[ ? = 51 - 38 = 13 \]

### Final Answer
Thus, the value of the question mark \(?\) is \(13\).

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