How many significant digits are in 80,000

Answers

Answer 1
Answer: 2 because the equation can be reduced to: 8.0 x 10^4.
Answer 2
Answer: Actually it's 5 because there is no decimal space and if you only include 8 then that means the number is actually 8.

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Find the equation of the perpendicular bisector of a line segment whose end points are (-3,9) and (-1,5)
IF the navy pier ferris wheel in chicago has a circumference that is 56% of the circunference of the first ferris wheel built in 1893. a. What is the radius of the navy pier wheel? b. what was the radius of the first ferris wheel? c. The first ferri wheel took nine minutes to make a complete revolution. how fast was the wheel moving?
89.64 decreased by 8%

A political action group wants to poll voters in theirarea. Of the 25 towns in their area, they randomly select
5 towns and include every registered voter from those
districts in their sample . What sampling method is
this?
A. clustered sampling
B. convenience sampling
C. simple random sampling
D. systematic sampling

Answers

Answer:

c

Step-by-step explanation:

they are simple way to vote

A scientist finds hominid fossils in China and in Australia. Judging by the rock layers in which both the fossils were found, the scientist suspects that they are approximately the same age. What should the scientist do next to build a stronger case that the fossils are the same age?

Answers

Since the fossils are of hominid origin, this means that they could contain carbon. Knowing this, carbon dating could be used to determine the age of the fossil. The technique is based on the ratio on carbon-12 and carbon-14. Carbon-14 undergoes radioactive decay, which is modeled by a first-order reaction. Knowing the half-life of carbon-14, one can solve the age of the fossils.

Find a4 in the sequence given by {a1=-3 and an=an-1+7

Answers

Answer:

a4 = -12

Step-by-step explanation:

The spoke of a wheel reaches from the center of the wheel to its rim. If the circumference of the rim of the wheel is 27 inches, how long is each spoke? Round your answer to the nearest hundredth.

Answers

Each spoke is 4.3 inches long.

Since the spoke is from the center of the wheel to its rim, we are looking for the radius of the circle.

Circumference = 2πr
27 = 2(3.14) r
27 = 6.28 r
27/6.28 = 6.28r/6.28
4.30 = r

The Appalachian trail is roughly 2,180 miles long. About how long is the trail in kilometer?

Answers

  1 mile = 1.609344... kilometer

           2,180 miles = (1.609344... x 2,180 km)

                               =          3,508.37 km      (rounded) 

What the product of 3 2/3 and 14 2/5

Answers

Hi There! :)

What the product of 3 2/3 and 14 2/5

52 4/5