First round to 899 to 9 then count 5 decimal places left then put in scientific notation 9.0 x 10^-5
2n + 9
let the number be n then twice the number is 2 × n = 2n
and 9 more than this means add 9 to, hence 2n + 9 is the expression
If i am correct i think it is 3× = 78 +×-2 idk but i think it that hopefully u get it right :)
Answer:
(a) 1024 ways
(b) 243 ways
Step-by-step explanation:
When answers are independent, the total number of ways all questions can be answered is the product of the number of ways each question can be answered.
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<h3>(a)</h3>
The first question can have one answer 4 ways. The second question can be answered 4 ways for each of the ways the first question was answered. That is, the two questions can be answered 4×4 = 16 ways. Similarly, each additional question multiplies the number of ways the questions can be answered by 4.
The 5 questions can be answered 4×4×4×4×4 = 4^5 = 1024 ways.
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<h3>(b)</h3>
There are 3 ways to answer the first question incorrectly. Each additional question can be answered incorrectly 3 ways for each of the ways previous questions were answered. The total number of ways all questions can be answered incorrectly is ...
3^5 = 243
A student can answer all questions wrong in 243 different ways.
Answer:
74,800
Step-by-step explanation:
3,800+71,000=74,800
