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devlian [24]
3 years ago
15

A true-false test has 12 questions. What is the probability of guessing the correct answers to all of the questions?

Mathematics
2 answers:
alexandr1967 [171]3 years ago
7 0
Each t or f has 2 possibilities so 2^12 or 4096
AleksAgata [21]3 years ago
7 0
1/2 is the answer. There are two choices, True and False so you have a 50/50 chance of being right 
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1kg costs £1.28. what is the cost of 250g
vivado [14]
First, convert 1 kg to g.

1 kg = 1000 g

So 1000 g = 1.28

Set up a proportion:

1000/1.28 = 250/x

Cross multiply:

1000x = 320

Divide 1000 to both sides:

x = 0.32

So 250g costs £0.32
8 0
3 years ago
Adjacent angles have no common interior points. A.)Always. B.)Sometimes. C.)Never
irina [24]
The actual answer is "always", as adjacent angles have no common interior points under any circumstances. The correct option among all the options that are given in the question is the first option or option "A". I hope that this is the answer that you were looking for and it has come to your help.
6 0
3 years ago
Read 2 more answers
A ladybug and ant move at constant speeds. The diagrams with tick marks show their positions at different times. Each tick mark
MissTica

Answer:

From the graph we can say that ant is moving faster than the ladybug

Slope of the ant's movement will be steeper than the ladybug

  • Hence<u>, </u><u>line "</u>v" denotes the speed of ant and <u>line "</u>u" denotes the speed of ladybug.

Unit rate/slope of the graph is (distance traveled/elapsed time)

  • <u>Unit rate of ant is 3/2 cm/sec</u> and <u>that of ladybug is 1 cm/sec.</u>
  • Ant takes (12×2/3) =<u> </u><u>8</u><u> </u><u>sec</u> and ladybug takes (12×1) =<u> </u><u>12</u><u> </u><u>sec</u> to travel 12 cm.

Remember ant will take less time to travel a certain distance than ladybug.

4 0
3 years ago
Select the equation below that could represent:
Irina-Kira [14]

Answer:

I think it might be the 2 one

3 0
3 years ago
What is the volume of A right prism w/ a triangular base w/ sides of 3,4 and 5 w/ a height of 10?
azamat

Check the picture below.

\bf \textit{volume of a pyramid}\\\\ V=\cfrac{1}{3}Bh~~ \begin{cases} B=&area~of\\ &its~base\\ h=&height\\ \cline{1-2} B=&\frac{1}{2}(3)(4)\\ h=&10 \end{cases}\implies V=\cfrac{1}{3}\cdot \cfrac{1}{2}(3)(4)(10)\implies V=20

3 0
4 years ago
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