Answer:
Radius = 8.575 cm
Step-by-step explanation:
Formula for volume of a pyramid is;
V_p = ½Ah
Where A is area of base and h is height
Also, formula for volume of cone is given as;
V_c = ⅓πr²h
Now, we are told that V_p = V_c and that h is the same for both shapes.
Thus ;
½Ah = ⅓πr²h
h will cancel out to give;
½A = ⅓πr²
Cross multiply to give;
3A/2π = r²
Base area of pyramid is given as 154 cm². Thus;
(3 × 154)/2π = r²
r = √((3 × 154)/2π
r = 8.575 cm
X-.165x=1210.75
.835x=1210.75 but where did i get .835 from?
.835 .835
X=1450
I don’t know what to put because there is no pdf or file attached
Answer:
45
Step-by-step explanation:
this should be correct :)
There are 9 in the 100's
108
117
126
135
144
153
162
171
180
There are 8 in the 200's (starting to see a pattern?)
207
216
225
234
243
252
261
270
There are 7 in the 300's
306
315
324
333
342
351
360
9+8+7+6+5+4+3+2+1 = 45
Of what?????? Need more info
