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dmitriy555 [2]
2 years ago
9

PLS HELP! ASAP!

Mathematics
2 answers:
Debora [2.8K]2 years ago
6 0
D. The solid figure can be broken into rectangles, it’s dimensions would be 24mx0.4m
E. To find how much concrete is needed you have to...
multiply LxWxH
So multiply 1.8x1.2x2.4=5.184
Then divide 1.8 by 3= 0.6
Each small rectangle is 0.6 m in height
5.184-1.8=3.384
Oduvanchick [21]2 years ago
4 0

Answer:

i only know (d)

was -i s now

1.8 m - 0.6 m

1.2 m - 0.4 m

2.4 m - 0.8 m

Step-by-step explanation:

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20 What decimal does this model represent? Explain.
umka2103 [35]

Answer:

The model represents the decimal 73.

Step-by-step explanation:

The model is 10x10. You must count the blue blocks. The number of blue blocks is 73, therefore it represents the decimal 73. (Hope this helped!)

8 0
3 years ago
Remember to show work and explain. Use the math font.
vichka [17]

Answer:

\large\boxed{1.\ f^{-1}(x)=\sqrt[12]{3^x}}\\\\\boxed{2.\ f^{-1}(x)=\sqrt[4]{3^x}}\\\\\ \boxed{3.\ f^{-1}(x)=\sqrt[3]{4^{7-x}}}

Step-by-step explanation:

(a^n)^m=a^{nm}\\\\\log_ab=c\iff a^c=b\\\\a^{\log_ax}=x\\\\n\log_ab=\log_ab^n\\\\\log_ab+\log_ac=\log_a(bc)\\============================\\\\1.\\y=3\log_3x^4\to y=\log_3(x^4)^3\to y=\log_3x^{12}

2.\\y=\log_3x^4\\\\\text{Exchange x and y. Solve for y:}\\\\\log_3y^4=x\Rightarrow3^{\log_3y^4}=3^x\Rightarrow y^{4}=3^x\\\\y=\sqrt[4]{3^x}\\-------------------------

3.\\y=-\log_4x^3+7\\\\\text{Exchange x and y. Solve for y:}\\\\-\log_4y^3+7=x\qquad\text{subtract 7 from both sides}\\\\-\log_4 y^3=x-7\qquad\text{change the signs}\\\\\log_4y^3=7-x\Rightarrow4^{\log_4y^3}=4^{7-x}\\\\y^3=4^{7-x}\Rightarrow y=\sqrt[3]{4^{7-x}}

7 0
2 years ago
Suppose p(a) = 0.40 and p(a 
sveticcg [70]
Between the probability of union and intersection, it's not clear what you're supposed to compute. (I would guess it's the probability of union.) But we do know that

P(A\cup B)+P(A\cap B)=P(A)+P(B)


For parts (a) and (b), you're given everything you need to determine P(B).

For part (c), if A and B are mutually exclusive, then P(A\cap B)=0, so P(A\cup B)=P(A)+P(B). If the given probability is P(A\cup B)=0.55, then you can find P(B)=0.15. But if this given probability is for the intersection, finding P(B) is impossible.


For part (d), if A and B are independent, then P(A\cap B)=P(A)\cdot P(B).
8 0
3 years ago
Why is 20 to 40 is a 100% increase but 40 to 20 is a 50% decrease
murzikaleks [220]
Its because 20 is doubling its self. Its using 100% of its number, While 40 is decreasing by 50%. Half of forty is 20. Half equals 50%.
6 0
3 years ago
Read 2 more answers
Choose the correct proportions.<br><br> 4, 1, 2, 2<br><br> a) 1:2 = 2:4<br> b) 1:4 = 2:2
Grace [21]

Answer:

Step-by-step explanation:

5 0
3 years ago
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