solve for d,r, or t- using the formula d=rt. d=400 miles, r=50mph, t=?
2006-07-19 16:25:11 · 7 answers · asked by Anonymous in Education & Reference ➔ Homework Help
Jasper h,
Move the decimal 4 places to the right: 23,000
400 = 50t
400/50 = t
t = 8
2006-07-19 16:28:55 · answer #1 · answered by MsMath 7 · 0⤊ 0⤋
2.3 x 10 exponent 4 = 23000
d = rt solve for t
d/r = t
400/50 = 8
2006-07-19 20:03:21 · answer #2 · answered by SAMUEL D 7 · 0⤊ 0⤋
10 to 4th exponent is 1 and 4 zeroes
one "zero" moves the decimal place over 1 to the right, you've still got 3 zeroes to account for. answer is 23,000
2006-07-20 05:18:52 · answer #3 · answered by Anonymous · 0⤊ 0⤋
23000. For each 10exponent you move the decimal to the right. If it had been 2.3*10^2, it would be 230.
400=50*t
400/50=8
t=8
2006-07-19 18:00:53 · answer #4 · answered by choirgirl1987 2 · 0⤊ 0⤋
2.3 x 10^4 = 23 000
d = rt
t = d/r
t = 400 mi / 50mph
t = 8 hrs.
(Note: the formula d = rt is actually wrong. There are 4 other formulas in kinematics that is accepted :
1. final distance = 1/2 (acceleration * time squared) + (initial velocity * time) + initial distance
2. final velocity = (acceleration * time) + initial velocity
3. change in position = average velocity * time
4. (final velocity squared) - (initial velocity squared) = 2 * acceleration * change in position
2006-07-19 19:21:23 · answer #5 · answered by emee_rocks 2 · 0⤊ 0⤋
i think it is 2300
d = r * t
400 = 500 * t
400 / 500 = t
0.8 = t
2006-07-19 18:01:22 · answer #6 · answered by fzaa3's lover 4 · 0⤊ 0⤋
yeah its 23000
2006-07-19 16:30:16 · answer #7 · answered by FlameGirl 1 · 0⤊ 0⤋