Questions by Sergey Potekhin

Questions by Sergey Potekhin

Ptolemy, an astronomer who lived during the second century CE, created a deeply complex model to describe the motion of the planets, a category he thought included the moon and the sun. He believed that

asked May 23, 2020

1 answer

0 votes

189k views

A _______ is a health insurance plan that directly employs or contracts with selected, or preapproved, physicians and other medical professionals to provide health care services in exchange for a fixed,

asked Sep 26, 2019

2 answers

3 votes

98.6k views

Alfred is practicing typing. The first time he tested himself, he could type 26 words per minute. After practicing for a week, he could type 28 words per minute. After two weeks he could type 30 words

asked Sep 8, 2019

2 answers

0 votes

166k views

At the beginning of year 1, Bode invests $250 at an annual simple interest rate of 3%. He makes no deposits to or withdrawals from the account.Which explicit formula can be used to find the account’s balance

asked Jan 14, 2019

2 answers

0 votes

190k views

What is the next number in the sequence? 1, 4, 13, 40, 121,...

asked Oct 21, 2018

1 answer

1 vote

114k views

Why is it important for scientists to share their findings with the public?

asked Jul 6, 2018

1 answer

5 votes

38.4k views

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