1. **State the problem:** David makes 7 successful shots out of every 10 free throw attempts. We want to find how many successful shots he will make if he attempts 100 free throws. 2. **Formula used:** To find the number of successful shots, multiply the success rate by the total attempts: $$\text{Successful shots} = \text{Success rate} \times \text{Total attempts}$$ 3. **Calculate the success rate:** David's success rate is 7 out of 10, which is: $$\frac{7}{10} = 0.7$$ 4. **Calculate the expected successful shots for 100 attempts:** $$\text{Successful shots} = 0.7 \times 100$$ 5. **Perform the multiplication:** $$0.7 \times 100 = 70$$ 6. **Answer:** David will be successful about 70 times out of 100 free throw attempts. This matches the choice **70** in the multiple-choice options.