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- 1-85 In Japan, high-speed “bullet trains” move with an average speed of 220. km./h. If Dallas and Los Angeles were connected by such a train, how long would it take to travel nonstop between these cities (a distance of 1490. miles)?Consider the following mathematical expression: (2.4 × 10³) (2.24 × (2.54)³) 0.7217 x = X The answer X should be expressed as significant figures.Perform the following calculation to the correct number of significant figures: ( (5.01 × 10^5) ÷ (7.8 × 10^2)
- The quadratic formula is used to solve for x in equations taking the form of a quadratic equation, ax? + bx + c = 0. -b ± b2 – 4ac quadratic formula: x = 2a Solve for x in the following expression using the quadratic formula. 2x2 + 21x – 7.1 = 0 Use at least three significant figures in each answer. x = and x =x (-5.1 × 10² = 1)·0 - 3 m S 7 cm(4.123 × 0.12) + 24.2 why is the answer 25 and not 24.7? The last rule to be used is the addition, which meant I would round to 1 decimal place in this case. Yet the final answer is rounded to two significant figures (multiplication rule), why is this?