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... exponents. We can

**do**that with the 10s, then divide the other non-10s... to 3 SF: F =**1**.98754 * 10¹ * 10¹⁹ F =**1**.**99*** 10¹ * 10¹⁹ Finally...1 Answers · Science & Mathematics · 07/02/2020

...'t have the disease) = 0.95 *0.

**99**= 0.9405 P(test negative ) = P(**Does**not have the disease and the test was...disease and the test was negative) so the**1st**is 0.9405 which we just determinded...1 Answers · Science & Mathematics · 29/09/2019

...; 4/33 <

**1**/8 , so k = 9 . 4/33 =**1**/9 + 3/297 =**1**/9 +**1**/**99**, so this process is finished . That is , 5/11 =**1**/3...2 Answers · Science & Mathematics · 01/09/2019

... (and other tricks) when

**doing**mental calculations. One... example, 7 times**99**. This is the same as 7 times (100 -**1**) 7 times 100 is easy (700...6 Answers · Science & Mathematics · 13/08/2019

### What are the least number of terms required for the sum of the series Σ(3-2r)* to be less than -100?

...to that are: n <

**1**- √101 or n >**1**+ √101 That's approximately: n < -9...when n = 12. Double-check: 11 terms --> sum = -**99**12 terms --> sum = -120 (which is the ...1 Answers · Science & Mathematics · 01/05/2019