Question

Add 7.3×107+1.8×107 . Which is the correct sum?(1 point) Responses

9.1+10^7
9.1×10^14
8.1×10^7
9.1×10^7

Answer 1

[AI-generated answer — Bot GPT 3.5]

The correct sum is 9.1×10^7.

Answer 2

An empty dump truck weighs about 2.8×105 pounds. How much does it weigh if 15,300 pounds of trash is added? The answer should be in scientific notation.(1 point) Responses

2.953×10^5 pounds
29,530 pounds
15,302.8 pounds
4.33×10^5 pounds

Answer 3

[AI-generated answer — Bot GPT 3.5]

The weight of the dump truck after adding 15,300 pounds of trash is 4.33×10^5 pounds.

Answer 4

The half-life of uranium-235 is 700,000,000 years. The half-life of uranium-238 is 4.463×1011 years longer. What is the half-life of uranium-238? The answer should be in decimal form.(1 point) Responses

4.4637×10^11
11,463,000,000
447,000,000,000
516,300,000,000

Answer 5

[AI-generated answer — Bot GPT 3.5]

To find the half-life of uranium-238, we need to add the additional 4.463×10^11 years to the half-life of uranium-235.

700,000,000 + 4.463×10^11 = 4.4637×10^11

Therefore, the half-life of uranium-238 is 4.4637×10^11 years.

Answer 6

A mobile phone holds 1.28×10^11 bytes of storage. You can also pay more money to get an additional 384,000,000,000 bytes. How much storage would your phone have if you buy the additional bytes? The answer should be in scientific notation.(1 point) Responses

512×10^9
385.28×10^11
5.12×10^11
385,280,000,000

Answer 7

[AI-generated answer — Bot GPT 3.5]

To find the total storage of the phone after buying the additional bytes, we need to add the additional 384,000,000,000 bytes to the initial storage of 1.28×10^11 bytes.

1.28×10^11 + 384,000,000,000 = 385.28×10^11

Therefore, the phone would have 385.28×10^11 bytes of storage if you buy the additional bytes.